Troubleshoot certmgr.CHM Errors and Download File

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

certmgr.CHM file Compiled HTML Help. 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 certmgr.CHM related errors on your device. You can also download certmgr.CHM file compatible with Windows 8, Windows 7, Windows Vista, Windows XP devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows 8, Windows 7, Windows Vista, Windows XP

File info

General information
Filename certmgr.CHM
File extension CHM
Type Compiled HTML Help
Description Compiled HTML Help
Program Windows 8
Software Windows
Author Microsoft
Software version 8
MIME type application/x-chm
Language cod English (U.S.)

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

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



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


Problems related to certmgr.CHM 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 certmgr.CHM 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.

certmgr.CHM 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 certmgr.CHM 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 certmgr.CHM 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 certmgr.CHM 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 certmgr.CHM file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the certmgr.CHM 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 certmgr.CHM 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 certmgr.CHM 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 certmgr.CHM file

The last solution is to manually download and replace certmgr.CHM 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 certmgr.CHM file.

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

  • Windows 8: C:\Windows\Help\mui\0409\
  • Windows 7: C:\Windows\Help\mui\0409\
  • Windows Vista: C:\Windows\Help\mui\0409\
  • Windows XP: C:\WINDOWS\Help\

If the steps did not solve your certmgr.CHM 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 certmgr.CHM
System Windows 8
File size 40707 bytes
Date 2012-07-26
File details
MD5 2ee93b4848293319f8c12be14155d8ef
SHA1 90bc55bb3215fede3014007ae02f63c6d9d7eb94
SHA256 a78fbd0a40952c210ddf71f738dd9da0abd9c0ebfd1d828d22d43f10ee499a27
CRC32 6c329dfd
Example file location C:\Windows\Help\mui\0409\
Filename certmgr.CHM
System Windows 7
File size 155016 bytes
Date -0001-11-30
File details
MD5 dd91959983ea8f04d7eed850b6488507
SHA1 1cbbf2c36f29fb322d1b86afdf8105e4471731bb
SHA256 e68fcb8f9286a970efe2c322bed8ad1beee67a1f62054169918166a19c0ef95a
CRC32 0df9288e
Example file location C:\Windows\Help\mui\0409\
Filename certmgr.CHM
System Windows Vista
File size 131844 bytes
Date -0001-11-30
File details
MD5 a3b623ad5359d47d651405f12af3ca79
SHA1 a78e4698c47d0ae28124dce5aa7d51cae5b971db
SHA256 3f891ee48eb396c2586a03b98d55f6bd130a9af0d56a3eb7947e1a90658fe414
CRC32 d5222035
Example file location C:\Windows\Help\mui\0409\
Filename certmgr.CHM
System Windows XP
File size 15255 bytes
Date 2008-04-14
File details
MD5 def92cac089ad454f235bd932e3f10e7
SHA1 beb5c108a0d417884fded3534fb82ed06d7a2ab4
SHA256 217072c76956933f4afcdda68c740cd83d22a06e4c9702ff7edb17752745b2f8
CRC32 e2e71fa9
Example file location C:\WINDOWS\Help\