Repair and Download WindowsDefender.admx Now

Sometimes Windows system displays error messages regarding corrupted or missing WindowsDefender.admx files. Situations like that can occur, for example, during a software installation process. Each software program requires certain resources, libraries, and source data to work properly. Corrupted or nonexistent WindowsDefender.admx file can therefore effect in failed execution of the started process.

WindowsDefender.admx file Windows Group Policy Language-neutral. The file was developed by Microsoft for use with Windows software. Here you will find detailed information about the file and instructions how to proceed in the event of WindowsDefender.admx related errors on your device. You can also download WindowsDefender.admx file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista

File info

General information
Filename WindowsDefender.admx
File extension ADMX
Type System
Description Windows Group Policy Language-neutral
Program Windows 10
Software Windows
Author Microsoft
Software version 10
File size 74791
Oldest file 2006-11-02
MIME type application/xml

There are various types of errors related to WindowsDefender.admx file. WindowsDefender.admx file may be located in wrong file directory on your device, may not be present in the system, or may be infected with malicious software and therefore not work correctly. Below is a list of most common error messages related to WindowsDefender.admx file. If you encounter one listed below (or similar), please consider the following suggestions.

  • WindowsDefender.admx is corrupted
  • WindowsDefender.admx cannot be located
  • Runtime Error - WindowsDefender.admx
  • WindowsDefender.admx file error
  • WindowsDefender.admx file cannot be loaded. Module was not found
  • cannot register WindowsDefender.admx file:
  • WindowsDefender.admx file could not be loaded
  • WindowsDefender.admx file doesn't exist



Application could not be started because WindowsDefender.admx file is missing. Reinstall the application to solve the problem.


Problems related to WindowsDefender.admx can be addressed in various ways. Some methods are meant only for advanced users. If you don't have confidence in your skills, we suggest consulting a specialist. Fixing WindowsDefender.admx file errors should be approached with utmost caution for any mistakes can result in unstable or unproperly working system. If you have the necassary skills, please proceed.

WindowsDefender.admx file errors can be caused by various factors, so its is beneficial to try to fix them using various methods.

Step 1: Scan your computer for any malicious software

Virus Scan

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with WindowsDefender.admx file or any other Windows system files should be scanning the system for malicious software using an antivirus tool.

If by any chance you don't have any antivirus software installed on your system yet, you should do it immediately. Unprotected system is not only a source of file errors, but, more importantly, makes your system vulnerable to many dangers. If you don't know which antivirus tool to choose, consult this Wikipedia article – comparison of antivirus software.

Step 2: Update your system and drivers.

Windows Update

Installing relevant Microsoft Windows patches and updates may solve your problems related to WindowsDefender.admx file. Use dedicated Windows tool to perform the update.

  1. Go to the Windows "Start" menu
  2. Type "Windows Update" in the search field
  3. Choose the appropriate software program (name may vary depending on your system version)
  4. Check if your system is up to date. If any unapplied updates are listed, install them immediately.
  5. After the update has been done,restart your computer in order to complete the process.

Beside updating the system, it is recommended that you install latest device drivers, as drivers can influence proper working of WindowsDefender.admx or other system files. In order to do so, go to your computer or device producer's website where you will find information regarding latest driver updates.

Step 3: Use System File Checker (SFC) tool

System File Checker

System File Checker is a Microsoft Windows tool. As the name suggests, the tool is used for identyfing and addressing system file related errors, including those related to WindowsDefender.admx file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the WindowsDefender.admx file with properly working version. To use the tool:

  1. Go to the Windows "Start" menu
  2. Type "cmd" in the search field
  3. Locate "Command Prompt" result – don't run it yet:
  4. Click the right mouse button and select "Run as Administrator" option
  5. Type "sfc /scannow" in console prompt to start the program and follow the instructions

Step 4: Restoring Windows system

Windows Recovery

Another approach is to restore system to previous state, before the WindowsDefender.admx file error occured. In order to restore your system, follow the instructions below

  1. Go to the Windows "Start" menu
  2. Type "System Restore" in the search field
  3. Start the system restore tool – it's name may differ depending on version of the system
  4. The application will guide you through the process – read the messages carefully
  5. After the process has finished, restart your computer.

If all the above-mentioned methods failed and the WindowsDefender.admx file problem has not been resolved, proceed to the next step. Remember that the following steps are intended only for advanced users.

Download and replace WindowsDefender.admx file

The last solution is to manually download and replace WindowsDefender.admx file in appropriate folder on the disk. Select file version compatible with your operating system and click the "Download" button. Next, go to your web browser's "Downloaded" folder and copy the downloaded WindowsDefender.admx file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of WindowsDefender.admx file example directory paths.

  • Windows 10: C:\Windows\PolicyDefinitions\
  • Windows 8.1: C:\Windows\PolicyDefinitions\
  • Windows 8: 1: C:\Windows\PolicyDefinitions\
  • Windows 7: C:\Windows\PolicyDefinitions\
  • Windows Vista: C:\Windows\PolicyDefinitions\

If the steps did not solve your WindowsDefender.admx file problem, you should consult a professional. A probability exists that the error(s) might be device-related and therefore should be resolved at the hardware level. A fresh operating system installation might be necessary – a faulty system installation process can result in data loss.

File versions list

Filename WindowsDefender.admx
System Windows 10
File size 74791 bytes
Date 2017-03-18
File details
MD5 7691c47b372536fa9bc384cee21d2ac9
SHA1 e08deeacc1dd8ea629e7e1554e2f2c644ae5b73c
SHA256 c6bce44b4c64b7861a5a1e6ec2e9911f5228cf411d228dd4f909cb5c593acb21
CRC32 78122f9c
Example file location C:\Windows\PolicyDefinitions\
Filename WindowsDefender.admx
System Windows 8.1
File size 73944 bytes
Date 2014-11-21
File details
MD5 bad0e923c3c26ac57daf18084532a219
SHA1 ebc832535eea6ee1ff57cfb646fe71feada43c9f
SHA256 5e7fa17af12f5acd1f854b9cbd014ffba5548538101f457581f57de525fd1d8f
CRC32 430ab0bf
Example file location C:\Windows\PolicyDefinitions\
Filename WindowsDefender.admx
System Windows 8
File size 3989 bytes
Date 2012-06-02
File details
MD5 601768fad47fc7c3a9ef45f11df39f01
SHA1 61a6226250af92d2a8bf78433c3f14d91d2ae5ac
SHA256 e048bcc10ea1182f6d4c17c6deebccbac47ca8a9bf0fcf638d6dc75021c03f91
CRC32 d20d0f8c
Example file location 1: C:\Windows\PolicyDefinitions\
Filename WindowsDefender.admx
System Windows 7
File size 5115 bytes
Date -0001-11-30
File details
MD5 c4d51295e14db112ee5dfe71b0981921
SHA1 53f6946e04c081df8d1bbbf237c8f32554403c41
SHA256 9f8df7c177ec8a98077c1d2c71f55c3d68684949f26c68c5f70d2b786cc8211f
CRC32 83938236
Example file location C:\Windows\PolicyDefinitions\
Filename WindowsDefender.admx
System Windows Vista
File size 5577 bytes
Date -0001-11-30
File details
MD5 960dc4de11debb39acc119ad83a1c4eb
SHA1 ae0ead10ff5c9e1326e1165aefb6193b729a62ff
SHA256 3431a181d09c046bb8bf9b6543cbfa184fa08a397a0696cd1300ced51a8fbbd8
CRC32 c4230fa6
Example file location C:\Windows\PolicyDefinitions\