mmc.CHM - Repair Issues and Download

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

mmc.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 mmc.CHM related errors on your device. You can also download mmc.CHM file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista, Windows XP 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, Windows XP

File info

General information
Filename mmc.CHM
File extension CHM
Type Compiled HTML Help
Description Compiled HTML Help
Program Windows 10
Software Windows
Author Microsoft
Software version 10
MIME type application/x-chm
Language cod English (U.S.)

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

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



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


Problems related to mmc.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 mmc.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.

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

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

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

  • Windows 10: C:\Windows\Help\mui\0409\
  • Windows 8.1: C:\Windows\Help\mui\0409\
  • Windows 8: 1: C:\Windows\Help\mui\0409\
  • Windows 7: C:\Windows\Help\mui\0409\
  • Windows Vista: C:\Windows\Help\mui\0409\
  • Windows XP: ---

If the steps did not solve your mmc.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 mmc.CHM
System Windows 10
File size 47381 bytes
Date 2016-11-04
File details
MD5 5e6b4381ef847f05374ed83e4d192ce4
SHA1 aa7a49955e909f9c2b09b71ec202bf183b6fb6f3
SHA256 277e0e3cd143bb00742aabd90ca67a3a50ab4e25241dcad18546b123d011846d
CRC32 d635eed5
Example file location C:\Windows\Help\mui\0409\
Filename mmc.CHM
System Windows 8.1
File size 47431 bytes
Date 2014-11-21
File details
MD5 a515e247bd0afd95a0def04185bb203c
SHA1 f130b2ee45703453ac7a19fb057ce0776b0ce06f
SHA256 e17833e85f49741fdc5ae1cb765c71c89fa38f62e6ea44f4e153eecbcd07115b
CRC32 2d2b9c2a
Example file location C:\Windows\Help\mui\0409\
Filename mmc.CHM
System Windows 8
File size 24575 bytes
Date 2012-07-26
File details
MD5 d5e7d0eb74a50e498d187928cd704129
SHA1 acd28123ccdeafad0b11b926bac1c34f59df69fc
SHA256 ca0e198d3147f0ff5f1be8d59ab13f6c093c808dc13c57da570adf426d05ae40
CRC32 259a1a8b
Example file location 1: C:\Windows\Help\mui\0409\
Filename mmc.CHM
System Windows 7
File size 54320 bytes
Date -0001-11-30
File details
MD5 964c4a3009f9de9e38b9d7b0d5fe0bed
SHA1 9dff04ee746c6e0f9d8e4409799efc86c81e1f03
SHA256 53868d8de9cf93f9fb1e35c9c195ae979f7cc811f838986ce1bc42765ef68764
CRC32 0003ea9a
Example file location C:\Windows\Help\mui\0409\
Filename mmc.CHM
System Windows Vista
File size 54454 bytes
Date -0001-11-30
File details
MD5 8ef7b9324b76d599e5fdff098297313f
SHA1 4e0276cb63f5c9df0ccc4f3a41940aada0792dc2
SHA256 57d12131a8f26608d6bbd8a82b1627b1d074dd4fc816d5dd0ec88cebc08ea74f
CRC32 f8c78e91
Example file location C:\Windows\Help\mui\0409\
Filename mmc.CHM
System Windows XP
File size 143747 bytes
Date 2008-04-14
File details
MD5 39b3686a82aa6d4c37fff734c92900fc
SHA1 2b629ddbc876039f67e3b562bb29a3bb738999b3
SHA256 aaffad64c8d36714b0dafb4cc6dce666ab38189d73b3214f7ece8864b046cec2
CRC32 37625be7
Example file location ---