Develop Reference

Android Emulator issues in new versions - The emulator process has terminated

After updating to Android Studio 2020.3.1 canary 15, when I try to run an emulator, it gets killed with this error:
The emulator process for AVD Pixel_4_API_30 has terminated.
It was working correctly in the previous version (4.1.3), but now after installing the new one, it shows the same error.
I've tried some solutions had suggested in almost similar cases; however, It still doesn't work.
I deleted my emulator (also I cleared inside of directory: /.android/avd/) and created a new one again
I updated the HAXM installer to version 7.6.5
I tried to run an emulator with lower APIs but...
Image of the error:

The main root cause of that issue is lack of free space on your disk

Faced this issue after update to arctic fox.
After seeing error message about termination, open android studio logs
("C:\Users\YourUserName\AppData\Local\Google\AndroidStudio2020.3\log\idea.log")
scroll it down and try to find log line with text "Emulator terminated with exit code". Probably, the reason for termination can be found a few lines above this message - for me it was
"Emulator: cannot add library vulkan-1.dll: failed".
If you have the same reason - go to C:\Windows\System32 directory, search here for file called vulkan-1-999-0-0-0.dll and just rename it to vulkan-1.dll (i've made a copy just in case and named it "vulkan-1.dll").
This fixed the issue for me.

Follow below steps to solve the issue:
Go to Tools -> SDK Manager
In SDK Manager Go To SDK Tools Tab and untick the Android Emulator and click on Apply. This step will uninstall the Android Emulator.
After uninstallation completes:
Again Open Tools -> SDK Manager -> SDK Tools -> Install the Android Emulator by enabling the check or tick on Android Emulator. This step will install the Android Emulator again.
After successful installation. Restart Android Studio. Create new emulator device and Run it. This should work.

Try to kill the emulator process and then you can reboot the emulator.
On Windows, bring out Task Manager and find the emulator process (you can find it starts with qemu-xxx, it might be wrapped inside Android Studio category), then click end task to kill the process.

For Linux (should be similar for windows)
Locate your Sdk/emulator directory
Run ./emulator -list-avds
Note the AVD name form output eg. 'Pixel_2_API_30'
Run ./emulator #Pixel_2_API_30
This will try to launch the emulator with selected device and show errors if any, in my case it was a disk space issue since I was low on home space.
emulator: ERROR: Not enough space to create userdata partition. Available: 5084.121094 MB at /home/user/.android/avd/Pixel_2_API_30.avd, need 7372.800000 MB.
I had plenty of space in other partition/disk, so I changed the AVD location by setting environment variable 'ANDROID_AVD_HOME' to preferred location, post this started the Android Studio and using the AVD Manager recreated a Device, HTH.

After going through all answers.
This answer can help you finding the root cause. clear the below file and restart the device to know the problem
C:\Users\YourUserName\AppData\Local\Google\AndroidStudio2020.3\log\idea.log"
My problem came as
2021-10-13 19:11:54,776 [1564693] INFO - manager.EmulatorProcessHandler - Emulator: init: Could not find wglGetExtensionsString! arbFound 0 listarbNull/empty 1 0 extFound 0 extNull/empty 1 0 remote 0
On further search i found the this which points out changing advanced settings (Ram size) and Graphics configuration
Step 1 :- while setting up device click on advanced settings
Step 2 :- Change the 2 setting as highlighted. make it 512 and Automatic to Software GLES

This solved the same issue for me:
Open text editor (eg. notepad)
Type this code:
Vulkan=off
GLDirectMem=on
Save the file as "advancedFeatures.ini" in .android directory. If your user is named Admin, under windows it would be: C:\Users\Admin\.android\advancedFeatures.ini.
Run your app.

In Windows, open the Task Manager and kill the process "qemu-system"

I faced the same issue. Fixed it by enabling the Hyper-V on my Windows 10 OS. I just typed Hyper in the Start menu and went to Turn Windows features on or off menu and ticked all the Hyper-V checkboxes like this:

I updated and had the same problem.
I solved the problem by changing the Multicore CPU and memory

To solve these type of issue, generally you haven't some file, that you need to download it from google and paste. I was facing the same issue. but after a lot of time spent on google finally I have got the solution.
Following are the steps:-
Create virtual device using AVD Manager
start the emulator
if it is showing your emulator has terminated
Then go to ("C:\Users\YourUserName\AppData\Local\Google\AndroidStudio2020.3\log\idea.log")
check the issue by scroll down(on bottom you can check)
If you are getting the same issue
Then go to C:\Windows\System32 directory, search here for file called vulkan-1-999-0-0-0.dll
If file is already in directory, then just rename the file into "vulkan-1.dll"
else download the file from this link
you will have zip file, just extract and paste the vulkan-1-999-0-0-0.dll file and perform the step 8.

This error also occurs when there is not enough free space left on your computer.
be sure to free up some more space.
$ emulator -avd phone2
ERROR | Not enough disk space to run AVD 'phone2'. Exiting...

OK I fixed my problem like the one above by:
I removed the emulator in the AVD manager and reinstalled it. I also deleted the ANDROID_HOME environment variable and it worked again for me in Artic Fox
I am on the latest version of Android Studio Artic Fox 2020.3.1 Patch One on Windows 10 and I upgraded the emulator yesterday 8/18/21 and it completely broke functioning emulators.

I would like to mention something about this,
The mentioned solutions works, however, if none works then please make sure you have sufficient space where AVDs are generated.
If system do not find the enough space to operate, it will give this error too, same as in my case.
If space is not an issue for you then mentioned other solutions must work.

Check if your disk space of computer is full or not. In my case C:// was full

In case if anyone facing this issue. I solved it by:
Go to C:\Users\YourUserName\.android
Create a file named advancedFeatures.ini
Then add the following lines of code in the file:
Vulkan = off
GLDirectMem = on

This might sound like a joke but restart the computer maybe? I had some emulator processes hanging in the task manager. Restarted the computer and it worked. Maybe it is an android studio bug.

Was facing similar issue while launching arm64 emulator. I had enough disk space and tried uninstalling the emulator and reinstalling it. But this didn't help.
I was able to figure out the issue by running the below commands:
emulator -list-avds
emulator #NameOfAvd
This assumes you've emulator on the path. Executing the last command showed me the below errors which weren't visible when running from Android Studio:
[4453299712]:ERROR:android/android-emu/android/qt/qt_setup.cpp:28:Qt library not found at ../emulator/lib64/qt/lib
Could not launch '/Users/username/../emulator/qemu/darwin-x86_64/qemu-system-aarch64': No such file or directory
Executing the command emulator #NameOfAvd from the Android/sdk/tools path allowed me to start the arm64 AVD.

It's an issue of latest Emulator.
I upgraded to v30.6.4 last night and got the same issue.
Please use Genymotion instead before Android Studio Emulator issuing its next update.
It's free for personal use.
https://www.genymotion.com/download/

My issue is resolved when I changed the CPU/ABI setting from "armeabi-v7a" to "x86_64".

Go to Device Manager on Android Studio
Click Drop Menu on Action Panel
Click Wipe Data
Launch your AVD Manager Again OR Restart Your computer

I Remove the Emulator folder from the SDK path and download the new component. It's working fine.

I was not able to start API_30 devices.
I had to install the latest hardware accelerator version (HAXM v7.7.0) from https://github.com/intel/haxm
Then

The simple solution was to free up some space from the hard-disk
In my case, only 2gb space was available in the hard-disk.
I made some space by emptying the bin, and now available space was 22gb.
Then I just started the emulator normally ( didn't uninstall or deleted anything) and it started.

In my MacbookPro M1 Pro, The issue was I had selected the x86 image while creating the emulator device.
Changing this setting and using the image from the recommended images resolved my issue.

I face same kind of issues... After increase free space of machine its working fine...

For those who running flutter/Dart in android studio. Here are the step on how I solved this:
Go to any of your current device in Device manager.
Click the edit icon (Pen Icon). Then dialog for edit will open.
Now change the "Graphics" property in the AVD under Emulated Performance from automatic to "Software-GLES 2.0". it works for me.
Note: Am using android studio Bumblebee | 2021.1.1 patch 2

The problem might be due to some corrupted data during saving the state. Cold start the VM will solve the problem.

Really, I had same issue. I had tried over 10 times..im not professor but I found finally. It was a tough time for me.
Try again follow next.
If you install Android again again, I think import setting has problem. wrong Path on android screen. not environment Path
Because automatically it is determined old path(when it installed first)
and Choose a lower API if possible
in my case, when I use API 17, the emulator acted. but API 30, The emulator has terminated...so, I think if you use windows 7 or low spec, use low API environment.
In addition, I needed installing emulator-windows_x64-7491168,zip (In my case)

After having tested solutions suggested in this forum, the only one which solved the problem to me is to free space in my hard disk. In my case I needed at least 7 GB to make it work.

AVD not starting (no error message)

I know that this was running on my system half a year ago, so I don't know what else to do.
I deleted every Android-related cofig-folders in my home directory. The newly generated config files are located in my home directory as well.
I'm starting Android Studio with an empty project (just created it new), click on "AVD Manager", install a Nexus6 with Nougat x86 (API Level 25) and then I'm hitting the "Launch this AVD in the emulator"-button.
At the bottom of Android-Studio a progress bar appears along with "Starting AVD...", but as the progress bar hits 100% nothing else happens.
No error message, no process being started, simply nothing happens after hitting that button.
I installed the package from the AUR https://aur.archlinux.org/packages/android-studio. I'm using LXDE as the DE.

Looks like android studio needed to install emulator when it was updated...
I got this problem after updating android studio and it was solved by the installing the emulator from SDK manager

After the last update my emulator stopped working without throwing any error. I had to edit my .bashrc to set it to use the system libraries.
Open your .bashrc file by typing the following commands on terminal:
cd ~/
gedit .bashrc
Add this line to the end of the fine:
export ANDROID_EMULATOR_USE_SYSTEM_LIBS=1
Restart the computer.
Edit: Instead of restarting you can also run source ~/.bashrc

Android emulator was not updated in my Android Studio. I went to SDK manager and installed the updated version from tools tab and then it started working.

I went to Tools > Android > AVD Manager
I then edited the desired device [galaxy_note_4] in my case, Selected Software - GLES 2.0, under Emulated Performance.
Worked for me, hope this helps

I went to AVD manager and cleared out my existing devices and just created a new one. Seemed to do the trick for me.

Just delete your avd and try to create a new one then you can see the error logs in idea.log.
In my case it couldn't find userdata.img for some reasons.

For me what worked was:
Select all x86 images in the respective phone model. Go to "show package details" in Android Studio within the "SDK" under the selected models and enusre the x86 image options are selected for the respective chosen model.
Also make sure no other applications are open at the backend not even the browser. Because even that is leading to hang may be due to the configuration of the system that I have.

In my case updating Intel Hardware Accelerated Execution Manager (HAXM) did the trick.
You can do it in SDK Manager under the SDK Tools tab

ERROR Android emulator gets killed in Android Studio

After updating to Android Studio 2 when I try to run my application and choose an emulator, I wait for the emulator to start and it suddenly gets killed. I can see the emulator process for some minutes but never the GUI. In Android studio, I get the error
android studio Error while waiting for the device: The emulator process for AVD was killed
This happens even if I run the emulator outside Android Studio. I have tried both an Android 6 and an Android 4.4-based emulator.
Running on a Windows 7 x64 PC. Similar post to another StackOverflow post which was closed. I have tried various ram, VM heap, and resolution settings.

I hit this issue trying to run Android API 30. In the end, I had to upgrade Android Emulator to 30.1.5 (it was 30.1.2 before this).

I had the same issue, the problem was there is not enough space in my disk drive.. you can see details about your specific situation in layer 'Event Log' this layer regularly is at the bottom on Android studio, it was my output Log:
"02:45 PM Emulator: emulator: ERROR: Not enough space to create userdata partition. Available: 3310.363281 MB at /home/user/.android/avd/my_Nexus_5X_API_27.avd, need 7372.800000 MB."
I had just 7 GB free, so just delete some GB's in my D.D. and it's working fine.

For me it seems it was a problem that OpenGL didn't work on my machine. I fixed it as follows:
Go to: Tools > Android > AVD Manager
Press the "edit" (pencil) icon next to your AVD
Change "Graphics" to "Software".

Check the free space of the emulator installation drive is more than 5 GB

Install the Intel x86 Emulator Accelerator worked for me.

This worked for me:
Tools -> SDK Manager -> SDK Tools (tab) -> Deselect 'Android Emulator' -> OK
Now, when you try to run your app, or launch device from AVD Manager, it will give the 'Install Emulator' error -> Click Ok.
This will automatically download the correct version.

For Android Studio v4.1 and above:
Menu -> Android Studio -> Preferences -> Tools -> Emulator
Uncheck Launch in a tool window option.

This issue happens when you have two Android SDK installations on your machine and the environment variable "ANDROID_HOME" points to the wrong location.
To fix it go to Android Studio settings, find the proper Android SDK location, update the environment variable and restart Android Studio / your PC.

I resolved the same issue by updating the Android Emulator.
Steps:
1. In Android Studio Go to TOOLS
2. SDK Manager
3. Android SDK
4. SDK Tools
5. Update the Android Emulator.
Then it will Run.
Check this for reference https://stackoverflow.com/a/64384372/13952516

Faced a similar issue, tried the above solutions as well and it didn't work.
Would like to suggest a simple solution which could help if the above suggestions didn't address the issue.
Solution - Try cleaning up space in the system. My problem was I had only 1GB left while trying to launch the emulator after cleaning up space got 8GB and was able to launch the emulator.

In android studio version 4.0 (WINDOWS), I could find the solution by just checking android studio welcome screen and clicking on the "Events" dropdown AFTER trying to launch the emulator (hence after getting the error):
the events section clearly shows that ANDROID_SDK_ROOT was not set in my system.
In a nutshell, whenever you see such error when starting the emulator, just check the "events" section in the welcome to android studio screen to find the real problem.
Beware that if ANDROID_HOME is not set properly, it will still tell you that ANDROID_SDK_ROOT is broken.

In my case, after installing the Microsoft Visual C++ Redistributable for Visual Studio 2015, 2017 and 2019 (both x86 and x64 version), the issue is solved.
But wait! Why did I know this? I will tell you my experience.
When your program meets a bug, the first thing you need to do is finding the log to debug. But where is the log file that records all the events of the Android emulator? Click Help→Show log in Explorer. And then a new window is oepned, where a file called idea.log is located, and that log file is what we are looking for.
But this file may has recorded too much verbose info, so let's do following processes to get a more simple one:
·Exit Android Studio
·Delete the idea.log
·Open Android Studio
·Click Tools→ AVD Manerger
·Start one of emulators you have created, and needless to say, the error will occur again. But the idea.log will be created and the error is recorded into the log file now!
·Exit Android Studio.
·Open the idea.log and begin to analyze it.
·Search "emulator", and in my case there are 2 messages catching my eyes:
INFO - manager.EmulatorProcessHandler - Emulator: E:\cache\SDK\emulator\emulator.exe -netdelay none -netspeed full -avd Nexus_5_API_22
INFO - manager.EmulatorProcessHandler - Emulator: Process finished with exit code -1073741515 (0xC0000135)
Obviously, the "exit code 1073741515" is something important, and actually many people have asked what it means in StackOverFlow, but unfortunately, I can't find any useful info about it. So let's pass it and focus on the first message.
Open the command line (Press "Win"+"R" → Enter "CMD" → Click "OK"), copy the above message E:\cache\SDK\emulator\emulator.exe -netdelay none -netspeed full -avd Nexus_5_API_22
and paste it to the command line. Press Enter.
I totally didn't know what this command meaned, but it's reasonable to deduce that Android Studio ran this command and resulted in the error, so I will try to reproduce the issue.
After that, an error window pop up, saying "...VCRUNTIME140_1.dll is missing...". I know I have been close to the answer. So I serch "VCRUNTIME140_1.dll Missing" on google, and people said that "downloading and installing both the x86 and x64 versions of the Microsoft Visual C++ 2015 - 2019 Redistributable will resolve this problem".
So I download both the x86 and x64 version and install them. After doing this, I run the emulator again, and everything goes well.

You need to update the following tools.

Please check your free space on your disk also. I had a same problem and finally I got I need to free up space to fix this.

If you're on the Apple Silicon (M1) chip, make sure you're using an ARM64-based emulator:
If you're not, create a new Virtual Device and use the arm64-v8a image from Other images.

Go to: Tools > Android > AVD Manager and Press the "edit" (pencil)
icon next to your AVD , Change "Graphics" to "Software".
work on my Windows 10 machine and ubuntu 18.04

If your username is not in ascii/ has spaces then this may help, as I tried all of the solutions here and couldn't fix this problem:
Note: I found this solution on this video, suggested by a user called "tatachka", this is her comment (she kindly let me share it here).
For example, I had this path
c:\Users\Таня.android\avd\Nexus_One_API_24.avd My name in Windows is
Таня, written in Cyrillic in windows encoding (cp1251). I changed the
path to e:\Distribu\AVD.android\avd\Nexus_One_API_24.avd I moved
files from disk C there and edited Nexus_One_API_24.ini changing the
path in it and everything worked.
How to change the folder path: My computer -> properties -> advanced
system parameters -> environment variables - > lower 'New...' button:
variable name: ANDROID_SDK_HOME variable value: e:\Distribu\AVD
(in my case)
After the reboot, a new folder(.android) appears in the folder
e:\Distribu\AVD containing the 'avd' folder
EDIT: For clarification, the idea here is that you don't want the path to have non-ascii characters. I moved it to C:\programs_that_cant_read_hebrew (and preformed the other steps) and it worked just fine.
EDIT: changed "English" to "ascii/ spaces" after the comments

I get this same error if you upgrade the emulator to version 30+ and run mac < 10.15
You see the real error if you run it from commandline
~/Library/Android/sdk/emulator/emulator -avd <name>
emulator: Android emulator version 30.5.3.0 (build_id 7196367) (CL:N/A)
dyld: Library not loaded: /System/Library/Frameworks/IOUSBHost.framework/Versions/A/IOUSBHost
You can fix this to upgrade to Big Sur or downgrade the emulator with these steps.
wget https://dl.google.com/android/repository/emulator-darwin-6885378.zip
unzip emulator-darwin-5395263.zip
mv ~/Library/Android/sdk/emulator ~/Library/Android/sdk/previous-emulator
mv emulator ~/Library/Android/sdk/emulator
cp ~/Library/Android/sdk/previous-emulator/package.xml ~/Library/Android/sdk/emulator/package.xml
Check if it succeed:
cd ~
~/Library/Android/sdk/emulator/emulator -version
28.0.25.0
~/Library/Android/sdk/emulator/emulator -list-avds
Source https://groups.google.com/g/flutter-dev/c/uEthfwjZBAQ/m/HSFqTgYsAgAJ
Edited April 8th 2021: I updated the emulator link to a newer version as mentioned in the comments

My case was: GOOGLE PLAY.
My virtual device was Pixel 4...
As shown on pic, Pixel4 has Google Play support, so that it give this error: " The emulator process for AVD Pixel4 was killed."
It gives error on Android Studio 4.1.1.
So that, I created a new virtual device(Pixel 4XL) and selected "SOFTWARE" for emulated performance...
Because this device doesnt have Google Play support, it worked for me.

Simple solution 2021
Go to AVD Manager
Find the emulator you are trying to use and then click on the down arrow
Select the option Show on Disk
delete every file that ends with .lock
Runs again the emulator and after this will initialize

goto tools>android>sdkmanager and update emulator and install related API level.It worked for me

This was working for me. You must update to android studio to latest version and then follow step below to update sdk tool:
Tools -> SDK Managers
Select Android SDK
Tab on SDK Tools
Check to update options available.
Press ok button
After that this procedure will take you some minutes, after it completed, everything will works fine.

I know so many people have given answers to this question many have valid points as well.
I have tried all the above possible ways, but it was not working, after reading logs from the android studio, I came to know it was a storage issue, for the emulator keep 11 GB space free and it will work.

Despite the question has been asked specifically for Windows, I will give my answer for MacOS 11.4 Big Sur, since this thread is the first hit on google when searching for this issue, and none of the answers already given solved the problem for me.
I found the solution to my problem here - for retention reasons, i will repeat the detailed steps anyway:
open Terminal and go to the directory /Users/<username>/Library/Android/sdk/emulator/qemu/darwin-x86_64/
create an xml file named entitlements.xml with the following content:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"
"http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>com.apple.security.hypervisor</key>
<true/>
</dict>
</plist>
resign the emulator
codesign -s - --entitlements entitlements.xml --force qemu-system-x86_64
start the simulator

For me it was a problem of available space left in my computer and deleting unnecessary files solved the problem. Causes are vary from situations and you should see event tab which detailed event log are showed.

To summarize the above:
Install and reinstall HAXM 7.5.6 (only available version) under 'Android SDK' settings. Try downloading it manually, even other versions (they don't work with Android SDK), installing it from the Android/Sdk folder, etc. sc query intelhaxm in cmd should show if it is running correctly.
Virtualization is enabled in your BIOS and has been tested
Made sure the PATH variables are correct (ANDROID_HOME / ANDROID_SDK_ROOT) but NOT (ANDROID_SDK_HOME) to the folder in your settings per Here. Otherwise, you will see EVENTS on the Android Studio splash screen.
Try unchecking / rechecking Launch in a tool window in Emulator settings (and even Enable Device Frame in AVD settings)
Try rebuilding in several different combinations of android, different phones, etc (but with same levels and packages ... 30 for example)
Try Rebooting in several different configurations
Make sure all SDK Tools are up-to-date, and even try a fresh install of Android Studio. However, tried removing all of them, and adding them back.
Check your space, try to have 25GB maybe or more free
Check for Virtual Box, Antivirus Software, etc.
Open Android Studio with Administrator privileges
RUNNING ON DUAL MONITORS / DOCKING STATION ?
A) Run the emulator with everything unplugged, then plug back in your monitor! (Odd I know)... OR Better yet...
B) Create a New Hardware Profile, which will enable you to change Graphics: Automatic to Software.

In Android Studio Go to Help -> Show logs in explorer
Try to run the Emulator again of the errors are as below :
handleCpuAcceleration: feature check for hvf
cannot add library vulkan-1.dll: failed
cannot add library vulkan-1.dll: failed
Then install Microsoft VS Code and go to below path
C:\Users<User>\AppData\Local\Programs\Microsoft VS Code
Copy the vulkan-1.dll and paste in below path
C:\Users<User>\AppData\Local\Android\emulator\lib64
For me this solutions worked

For me, just deleting ANDROID_SDK_HOME from the environment variable list solved the problem

I tried every single answer in here but none of them worked, but finally I got it working when I run it on an emulator device with Android API 28. I think the problem is the emulator device couldn't run Android API 30.

I think this is problem of Android studio 2 Update or Problem to solve please Update also Android sdk version also then work properly.

PANIC: Missing emulator engine program for 'arm' CPUS. in Android studio

Before some time everything was working fine, But now when I launch emulator I am getting error as
PANIC: Missing emulator engine program for 'arm' CPUS.
Here is screen shot
I had tried to update sdk manager, But there is nothing to update.
In extras everything is installed, But I think there is something missing in this package, But I don't know how to install that one. Any suggestion will be appreciated. Thanks in advance.
After clicking on help menu and check for updates I got message as You already have updated version as shown in image below
I also uninstall android sdk tools and reinstall it but still no luck

Avast Antivirus is sensing emulator-arm.exe as a threat and blocking from some reasons. When you add it to exclusions in Virus Chest page with right-click -> "restore and add to exclusions" it's not solved in future runnings. To solve this permanently in Avast 2015 :
Settings ->
Active Protection ->
File System Shield ->
Customize ->
Exclusions then add threat as a exclusion . And then press ok.

I answered this in another post.
In my case, my PATH environment variable was set incorrectly. It was including
/sdk/tools
Instead of
/sdk/emulator
emulator.exe exists in both of these directories, so the emulator command will work either way. However, emulator-arm.exe only exists in my emulator directory.

Had the same problem but here PANIC: Missing emulator engine program for 'arm' CPUS was helpful information
For some reasons Avast antivirus has considered emulator-arm as virus and put it to quarantine. And continues to do that. Check please if You have that AV soft
It started near hour-two ago so can be related to new "viruses definitions" of Avast that somewhy quarantines that files

Hi Guys after JakeM and Hnkonan response to my question I got answer to my question. First of all thanks to both.
The main reason was Avast antivirus. First of all I had disable avast after that I had open Virsu chest of it and I got there emulator-arm.exe file. I had restore it. After that I restart android studio. But at this time it giving me error as
Android-Studio : Error: Could not create the Java Virtual Machine
I had downloaded notepad++ then open android studio/bin folder in this bin folder there is one file name as studio.exe.vmoptions. Open this file file using notepad++ and change the -Xms128m to -Xms512m and restarted Android Studio.
After that I am able to launch emulator. Currently my Avast is disable but it may possible after enabling it will again move emulator-arm.exe file to virus chest. Thanks guys

I have had this problem in Eclipse. It looks like Avast thinks it is infected with Win32:Dropper-gen.

I had the same problem. Avast was blocking the files as #JakeM stated. After following what #PPD stated its working fine. Even when Avast is turned on. Not much of an answer but hope it helps.

It is a problem with emulator-arm.exe in tools directory of sdk. Copy it from install package and everything will be OK

new AVD can't click on OK button, not system image [duplicate]

This problem sounds similar to a few others, except in my case the OK button is not grey-ed out. But for those who would rather not click the links...
Trying to create or edit an AVD from within Eclipse, after entering my settings, the "OK" button seems to be "clickable", but when I click it absolutely nothing happens.
I've made sure I have the appropriate system images installed, and that the target platform matches the API being used. Clearly a CPU has been chosen, skin set, etc... all the things that would make the OK button greyed out, which it's not.
I can create/edit AVDs if I run the AVD manager from outside eclipse, so this isn't the end of the world, but I feel there's a solution to this particular problem and I want to help solve it.
I've tried running eclipse as an administrator (that's what stopped the AVD manager from crashing outside of eclipse). I've tried just waiting around, or clicking multiple times. Looking at the Task Manager, no new processes begin when I click OK, nor does eclipse's CPU or RAM usage increase at all. The "Edit Android Virtual Device" window doesn't even go away.
Any clues?
(Running Indigo with the ADT plugin, btw, not the bundled version, which failed to work in a different way. Java 1.6.0 45. Windows 8, unfortunately. Plenty of RAM etc)

THIS IS A POSSIBLE WORKAROUND FOR BUGS IN ADT 22.6.0 ONLY, THESE BUGS SUBSEQUENTLY FIXED IN FOLLOWING BUILDS
Download and install new ADT v22.6.1 from here (zip) or use SDK manager to update
Seems like some bug from Google side, this problem found after "ADT 22.6" update. Widely reported on "Android Open Source Project - Issue Tracker" and nobody properly answered it yet.
However I was partially successful to create an AVD by opening "AVD manager.exe" from "Android SDK" for creating new AVD try to open directly AVD Manager.exe in SDK folder.
May be we have to wait for any conformation from Android community
Worked for me, sort of.. .
(Windows 8.1 Pro 64 Bit, Java JDK 1.7 Update 25, Eclipse Standard Kepler Service Release 1, Android Development Toolkit 22.6.0.v201403010043-1049357)
Update 1
Further research revealed that launching AVD Manager from SDK Manager (Tools --> Manage AVDs...) also works without any problems.
Update 2
More bad news is AVD creation not working from command line tool too.
Update 3
Assuming some parameter passed during launching AVD manager from Eclipse causes these problems
Update 4
Updated Java to JDK 1.7 Update 51 and Eclipse Standard SDK to Kepler Service Release 2 their latest and no resolution to the problems. Also tested under Debian and same results obtained.
Update 5
At https://code.google.com/p/android/issues/detail?id=66661 android project members conforms the problems and promises to fix by upcoming versions of ADT (22.6.1 - 22.6.3). At the mean time I would suggest to roll-back ADT to a lower version version 22.3.0
To uninstall current ADT go to
Help --> About Eclipse --> Installation Details --> Android Development Tools --> Uninstall
I may suggest uninstalling whole packages from Android (DDMS, Hierarchy Viewer, NDT, Traceview, OpenGL ES..etc..) to avoid any possible compatibility issues and install a fresh new ADT from above link through archive installation method.
Hope this will solve this problem temporarily. And wait for new release of ADT here.
Update 6
New ADT, version 22.6.1 is out now which will solve these problems

To elaborate on the statement "I can create/edit AVDs if I run the AVD manager from outside eclipse" in the OP:
Run the following on the command line
<android-sdk-location>/tools/android avd (on Linux in this case)
This launches the same AVD window you see when you click the AVD Manager icon in the eclipse toolbar. But this instance of the AVD manager does not have the bug, and you can create and run emulators as you did before the bug was introduced.

1 minute solution
I used a quick workaround where I cloned a device that already existed. The Clone button worked and I was able to successfully edit the clone.
Steps:
Select a Device by Google
Click the "Clone..." button
A window will pop up, click "Clone device"
Select the newly cloned Device, it should say "... by User"
Click the "Edit" button on the side
There you have it, you now have your own custom virtual device

Update and Solution: AsYashwanth Krishnan said, The bug in question is now fixed in later versions. I tried ADT 222.6.1 and ADT 22.6.2 , and they did not suffer from the bug of not not being able to create or edit Android Virtual Devices. The direct solution is to update you ADT to latest version, The workaround written below is left only for historical purposes.
Historical Workaround As #Yashwanth Krishnan said, this is a bug in ADT plugin 22.6; so best workaround is to rollback. for those asking how to rollback, here is a step-by-step guide:
First: Uninstall ADT plugin and all related plugins for android:
help->about
Installation details
Select android plugins and press uninstall button
Restart
Second: Download ADT 22.3.0 Archive from https://dl.google.com/android/ADT-22.3.0.zip
and install it
add repository from archive on local disk
Select android plugins

INFO:
I WAS able to create an AVD successfully after clicking OK several times and modifying some of my settings as a test.
I tried yashwanth krishnan solution and tried to open the AVD Manageer.exe directly without success. The manager will not open directly for me on Windows 8 x64. It tries to open, then shuts down immediately...

I met this issue too . The issue occurs in the latest version 22.6 which was released in March . Meanwhile I did the testing in 22.3 , the issue was not found .
So that I suggest that rollback the ADT to 22.3 and wait the new fix for 22.6

I banged my head on this for several hours until I found out that the default location was C:\username path\SDKs or something, where Android was installed on my system to D:\sdks\android_sdk_windows. So, changing the Eclipse Android directory to D:\sdks\android_sdk_windows fixed it.
I also heard that it may help things if you install the Android SDK to a path without spaces.
Hope this helps someone keep some hair.

Today I ran into the same problem after installing Maven. I messed around with different Path settings to get it to work and I ran into issues. I was also trying to install the google server for GCM. Somewhere in what I was doing I corrupted the Android Virtual Device Manager. I searched S.O. for an answer, then I decided to follow the first rule of TechSupport. I reinstalled the tool kit!
I went into the SDK manager and I uninstalled the tools (by clicking the Tool checkbox). It took several minutes to delete them all. Then I reinstalled the Tools which took about ten minutes. I rebooted Eclipse and the AVD and worked just like it did yesterday!
This time it only took a total of twenty minutes to fix.

Per the release notes, this problem has been resolved in revision 22.6.1, which is now available for download.
Updated your Android SDK Tools to 22.6.1 in Eclipse by selecting Window > Android SDK Manager and follow the prompts to install the update.
After that update finishes, select Help > Check for Updates and follow the prompts to update the appropriate Eclipse components.
After completing these updates, I tested the AVD functionality and it appears to be working properly.

i just copied the avds from a different system as descriped here:
Android - How to copy the emulator to a friend for testing

I faced the similar issue. I am using 23.0.2 version of android SDK.
"OK" button was disabled, but then I went to the path where android SDK was installed. In my case:
C:\Program Files\Android\android-sdk\
and executed AVD-Manager.exe by right clicking and selecting Run as an Administrator, and it worked like a charm.

Sometimes the AVD cannot be created because of this following error while starting:
x86 emulation currently requires hardware acceleration!
I was also facing this same issue. If u are facing the same, then it can be resolved by opening SDK Manager -> Under Extra -> Installed "Intel x86 Emulator Accelerator (HAXM Installer). Then when creating the AVD, select the proper CPU. This should work. :-)

For those posting that we need to set the sdcard size: I tried that and many other settings, and none of that helps. I get the NoClassDefFound Exception mentioned by mogilka, in the Error view. No configuration settings are going to fix that. It seems a bad update was pushed

Give some value for your sd card. May be something like 100 or 200