How to Fix V0400Ext.crl Error? Is it safe?

Frustrated by the V0400Ext.crl error message? Well, you should want to know what this V0400Ext.crl file is, what causes this error and the most important thing is how to fix this error. In this page, you will find all answers to your questions about this V0400Ext.crl and the methods to fix it.

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What's V0400Ext.crl File?

As its file extension denotes, V0400Ext.crl is a vital crl file and it's a component of the software unknow developed by Windows Software Developer. The latest version of V0400Ext.crl file is unknow and MD5 value is 103628bbf792cc0fd10bdfa57734631c. This error can be seen on Windows XP, Windows Vista, Windows 7, Windows 8 and Windows 10.

V0400Ext.crl file information:
File Name:   
   V0400Ext.crl (Free Scan)
File Description:   
   DirectShow/VFW Extension property page resource library
   Windows Software Developer
File md5:   
File type:   
   crl file
Security Level(0-5):   
OS Infected:   
   Download V0400Ext.crl Error Free Scan Tool

Why Do I Receive V0400Ext.crl Error?

unknow and the Windows will generate V0400Ext.crl error when V0400Ext.crl file cannot be used due to the removal or corruption of V0400Ext.crl file. Virus infection is also a potential cause of V0400Ext.crl error.

Popular V0400Ext.crl Error Messages

  • The application has failed to start because V0400Ext.crl was not found. Re-installing the application may fix this problem.
  • The program can't start because V0400Ext.crl is missing from your computer. Try reinstalling the program to fix this problem.
  • V0400Ext.crl failed. The specified module could not be found.
  • File not found: V0400Ext.crl.
  • Failed to load library 'V0400Ext.crl'.
  • Access violation in module 'V0400Ext.crl'.
  • Component 'V0400Ext.crl' or one of its dependencies not correctly registered a file is missing or invalid.

You may receive V0400Ext.crl error when you run or close unknow, start or shut down the computer, or use specific function of unknow. The time you encounter the error is very important to troubleshoot the problem.

Causes of V0400Ext.crl Error

V0400Ext.crl error can be caused by plenty of reasons. The following are the most common causes of V0400Ext.crl error.

  • The latest version of V0400Ext.crl file is overwritten by a previous version installed by another newly-installed program.
  • There is a malfunctioning or faulty hardware in your computer.
  • V0400Ext.crl file is infected with malicious adware, Trojans, spyware and malware.
  • The associated entries of V0400Ext.crl are corrupted in the registry.
  • V0400Ext.crl file that is still used by other programs is uninstalled by another program.

How to Fix V0400Ext.crl Error?

If you're confident of fixing this problem yourself, we have listed several solutions to troubleshoot your V0400Ext.crl problem.

Method 1: Replace corrupted system files with System File Checker.

System File Checker is a utility integrated in Windows system to help users easily scan and replace corrupted system files which may include files related to V0400Ext.crl. If a "protected" file is modified or missing, this utility will restore it from a cached copy to ensure Windows work correctly.


a. Open an elevated command prompt.

Windows Vista and Windows 7

Click Start, click All Programs, Accessories, and then right click Command Prompt and click Run as administrator.

command prompt windows 7

Windows 8, Windows 8.1 and Windows 10

Open Win X menu by holding Windows and X keys, and then click Command Prompt (Admin).

windows8 win x menu

b. After confirming the UAC prompt, type sfc /scannow in the Command Prompt and hit Enter.

sfc windows 7

c. System File Checker is scanning your system and takes some time to complete the repair.

Method 2: Run a virus scan.

Malware infection is one of the most popular cause of various computer problems like V0400Ext.crl error. Computer malware can make their way into the system, change system settings and corrupt system files. When this happens, unknow and Windows becomes more prone to V0400Ext.crl error and even malfunction.


a. Restart your system into Safe Mode with Networking.

b. Open your antivirus or antispyware program. (You can also use this recommended malware detect tool)

c. Run a full scan for your system.

d. After the scan completes, either quarantine or remove any detected malware.

e. Restart your system.

Method 3: Look for deleted V0400Ext.crl file.

When unknow and the Windows cannot find V0400Ext.crl file, it will tell you that V0400Ext.crl is missing or not found. As a result, try your luck to see if V0400Ext.crl is in the Recycle Bin.


a. Double click on the Recycle Bin icon on your desktop to open it.

b. Search thru all deleted files there and look for the V0400Ext.crl file.

c. If it's found, then right click on it and click Restore.

restore file

What can you do if the Recycle Bin has been emptied? Try to use a file recovery tool to help you recover the file.

Method 4: Repair corrupted Windows registry.

As the most important part of Windows operating system, Windows registry is a place that stores all information and configurations of software and hardware. A problematic registry is one of the most common causes of computer errors like V0400Ext.crl error. Software installation, uninstallation, malware infection can make changes to the registry. Over time, more and more invalid entries are left and accumulated in the registry and then lead to various errors and problems. The registry needs regular maintenance to keep it tidy and stable. Manual editing the registry is not practical for people with no computer expertise, it's recommended that you use a registry cleaner to do this job.


Note: It requires certain computer knowledge to perform the above solutions. If you're not comfortable with this process, it's recommended that you download and run this automatic error fix utility to fix your PC problems automatically:

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Does V0400Ext.crl error still persist?

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