Download, Fix, and Update AppCompat.adml

Last Updated: 11/27/2023
[Time Required for Reading: 3.5 minutes]

AppCompat.adml uses the ADML file extension, which is more specifically known as a Group Policy Language-Specific Administrative Template file. It is classified as a XML (Group Policy Language-Specific Administrative Template) file, created for Windows 10 by Microsoft.

AppCompat.adml was initially released with Windows Vista on 11/08/2006 for the Windows Vista Operating System. The latest version update [v10] for Windows was 10 released on 07/29/2015. AppCompat.adml is included with Windows 10, Windows 8.1, and Windows 8.

Continue reading below to discover detailed file information, ADML file troubleshooting, and free downloads of several versions of AppCompat.adml.

File Analysis Provided by Jason Geater (Author)


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Compatible with Windows 11, 10, 8, 7, Vista, XP and 2000

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File Overview


General Information
File Name: AppCompat.adml
File Extension: ADML file extension
File Type: System
Description: Group Policy Language-Specific Administrative Template
MIME Type: application/xml
User Popularity Rating:
 
Developer and Software Information
Software Program: Windows 10
Developer: Microsoft
Software: Windows
Software Version: 10
File Details
File Size (Bytes): 10118
Oldest File Date: 11/02/2006
Latest File Date: 03/18/2017


What are AppCompat.adml Error Messages?


General AppCompat.adml Runtime Errors

AppCompat.adml file errors often occur during the startup phase of Windows, but can also occur while the program is running. These types ADML errors are also known as “runtime errors” because they occur while Windows is running. Here are some of the most common AppCompat.adml runtime errors:

Microsoft Visual C++ Runtime Library

Runtime Error!

Program: C:\Windows\PolicyDefinitions\en-US\AppCompat.adml

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.


Most ADML errors are due to missing or corrupt files. Your AppCompat.adml file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Windows), or deleted by a malware infection. Furthermore, AppCompat.adml file corruption could be caused from a power outage when loading Windows, system crash while loading or saving AppCompat.adml, bad sectors on your storage media (usually your primary hard drive), or malware infection. Thus, it’s critical to make sure your anti-virus is kept up-to-date and scanning regularly.



How to Fix AppCompat.adml Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your AppCompat.adml issue. These troubleshooting steps are listed in the recommended order of execution.


Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. When you see the search box, type "System Restore" and press "ENTER".
  3. In the search results, find and click System Restore.
  4. Please enter the administrator password (if applicable / prompted).
  5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
  6. Restore your computer to that backup image.

If the Step 1 fails to resolve the AppCompat.adml error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing AppCompat.adml file.

System File Checker is a utility included with every Windows version that allows you scan and restore corrupted system files. Use the SFC tool to fix missing or corrupt AppCompat.adml files (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. In the search box, type "cmd" but DO NOT PRESS "ENTER".
  3. Press and hold "CTRL-Shift" on your keyboard while pressing "ENTER".
  4. You'll be prompted with a permission dialog box.
  5. In the box, click "YES".
  6. You should have a black screen with a blinking cursor.
  7. In that black screen, type "sfc /scannow" and hit "ENTER".
  8. SFC will begin scanning for AppCompat.adml issues and any other system file problems.
  9. Follow any on-screen commands to complete the process.

Please be aware that this scan might take a while, so please be patient while it is working.

If this Step 2 fails as well, please proceed to the Step 3 below.

sfc /scannow

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many AppCompat.adml error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

  1. Hit the Windows Start button
  2. In the search box, type "Update" and press "ENTER".
  3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
  4. If updates are available for download, click "Install Updates".
  5. After the update is completed, restart your PC.

If Windows Update failed to resolve the AppCompat.adml error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.



If Those Steps Fail: Download and Replace Your AppCompat.adml File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate AppCompat.adml file version. We maintain a comprehensive database of 100% malware-free AppCompat.adml files for every applicable version of Windows. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download AppCompat.adml Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy the file into the appropriate directory for your Windows version:

  4. Windows Vista: C:\Windows\PolicyDefinitions\en-US\
    Windows 7: C:\Windows\PolicyDefinitions\en-US\
    Windows 8: C:\Windows\PolicyDefinitions\en-US\
    Windows 8.1: C:\Windows\PolicyDefinitions\en-US\
    Windows 10: C:\Windows\PolicyDefinitions\en-US\
  5. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.


GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve AppCompat.adml problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.



Download AppCompat.adml Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying AppCompat.adml to your appropriate Windows system directory. Microsoft typically does not release Windows ADML files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing AppCompat.adml and all other ADML files for Windows. An incorrectly installed ADML file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10
Windows Vista
Windows 8.1
Windows 8
Windows 7


Files Related to AppCompat.adml


ADML Files Related to AppCompat.adml

File Name Description Software Program (Version) File Size (bytes) File Location
WinCal.adml Group Policy Language-Specific Administrative Template Windows 10 1085 C:\Windows\Panther\UnattendGC\
SettingSync.adml Group Policy Language-Specific Administrative Template Windows 10 9740 C:\Windows\System32\DriverStore\FileRepository\...
UserProfiles.adml Group Policy Language-Specific Administrative Template Windows 8 43368 C:\Windows\inf\
Sidebar.adml Group Policy Language-Specific Administrative Template Windows 8.1 2181 C:\Windows\inf\WmiApRpl\0009\
Explorer.adml Group Policy Language-Specific Administrative Template Windows 10 4363 C:\Windows\System32\Sysprep\Panther\

Other Files Related to AppCompat.adml

File Name Description Software Program (Version) File Size (bytes) File Location
WWAN_profile_v1.xsd XML Schema Definition Windows 8 6201 C:\Windows\L2Schemas\
WLANAP_profile_v1.xsd XML Schema Definition Windows 8 7504 C:\Windows\L2Schemas\
WLANAP_profile_v1.xsd XML Schema Definition Windows 8.1 7548 C:\Windows\L2Schemas\
WLAN_profile_v1.xsd XML Schema Definition Windows Vista 15591 C:\Windows\L2Schemas\
LAN_policy_v1.xsd XML Schema Definition Windows XP 2687 C:\Windows\L2Schemas\


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