WindowsDefender.adml - How to Fix? Download Now

Sometimes Windows system displays error messages regarding corrupted or missing WindowsDefender.adml 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.adml file can therefore effect in failed execution of the started process.

WindowsDefender.adml file Group Policy Language-Specific Administrative Template. 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.adml related errors on your device. You can also download WindowsDefender.adml 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.adml
File extension ADML
Type System
Description Group Policy Language-Specific Administrative Template
Program Windows 10
Software Windows
Author Microsoft
Software version 10
File size 80676
Oldest file 2006-11-02
Latest file 2017-03-18

There are various types of errors related to WindowsDefender.adml file. WindowsDefender.adml 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.adml file. If you encounter one listed below (or similar), please consider the following suggestions.

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



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


Problems related to WindowsDefender.adml 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.adml 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.adml 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.adml 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.adml 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.adml 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.adml file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the WindowsDefender.adml 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.adml 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.adml 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.adml file

The last solution is to manually download and replace WindowsDefender.adml 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.adml file.

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

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

If the steps did not solve your WindowsDefender.adml 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.adml
System Windows 10
File size 80676 bytes
Date 2017-03-18
File details
MD5 1f477447612af0549efcf4e4189ec650
SHA1 053f851db543cb874162c3ad701d72887e7a57e2
SHA256 210ec369d9b51524064af6017630872d56c6f7ae77e125a05baa3a3e950a79c5
CRC32 5ea421bb
Example file location C:\Windows\PolicyDefinitions\en-US\
Filename WindowsDefender.adml
System Windows 8.1
File size 75437 bytes
Date 2014-11-21
File details
MD5 f1a80f0c326a0fde6917dd3ad03c6561
SHA1 c014384966def2c68671e9bed95371447d96fa77
SHA256 03dd8b1e813023915a4f0143749e9ce752f81edb973d4071ca522a03028ce619
CRC32 a409cf62
Example file location C:\Windows\PolicyDefinitions\en-US\
Filename WindowsDefender.adml
System Windows 8
File size 5813 bytes
Date 2012-07-26
File details
MD5 51d31ddc036d9580a07737b5a9650f11
SHA1 ea23875deb5b2d8a2c1e2c7748c8d064db8f3e6b
SHA256 2dbc5798ff81c37e28e6702daf4b26477c263f9dee26a706ab856abe3f133358
CRC32 88c5dd06
Example file location 1: C:\Windows\PolicyDefinitions\en-US\
Filename WindowsDefender.adml
System Windows 7
File size 8889 bytes
Date -0001-11-30
File details
MD5 365ddf267e599a8e06ee8a6fb638faa4
SHA1 ccc2fd162e63e7106ea6ed99bf16c85e66b92424
SHA256 f2fecbf06980ec4eccc952af6861b8618fd7414939f74a6b1798fce47910b187
CRC32 de53659b
Example file location C:\Windows\PolicyDefinitions\en-US\
Filename WindowsDefender.adml
System Windows Vista
File size 8260 bytes
Date -0001-11-30
File details
MD5 0bdc8a9d27758de5d5bd41b0c2d6fd34
SHA1 2770f58193cb4385f3389955df46998f09d34801
SHA256 d011b17c7735f2a77bbc6e4fd97590a21575725c0535faaa184ca26e0bd0b848
CRC32 152204d4
Example file location C:\Windows\PolicyDefinitions\en-US\