Fix sua.CHM Errors

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

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

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

File info

General information
Filename sua.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 sua.CHM file. sua.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 sua.CHM file. If you encounter one listed below (or similar), please consider the following suggestions.

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



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


Problems related to sua.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 sua.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.

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

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

Go to the folder where the file should be located and paste the downloaded file. Below is the list of sua.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\

If the steps did not solve your sua.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 sua.CHM
System Windows 8
File size 34422 bytes
Date 2012-07-26
File details
MD5 9074912b5aacc60d77731c52c17a9355
SHA1 028b8920e0a9cb69658366af5b4eed0d5996c9b5
SHA256 1676e1eb88cb0869fe379640acb7b628112aec41ac17c710e1169001a213fdde
CRC32 3fe4ae6c
Example file location C:\Windows\Help\mui\0409\
Filename sua.CHM
System Windows 7
File size 70460 bytes
Date -0001-11-30
File details
MD5 017805bd8cda6f0b94cd06b095744297
SHA1 76168ef044dccf3e2980b175181b8bd811ef2f71
SHA256 526e66bedba1146913edb20ad48872465383ca850c1fbdb7f0ea7051fd5915bf
CRC32 49b16aa0
Example file location C:\Windows\Help\mui\0409\
Filename sua.CHM
System Windows Vista
File size 70744 bytes
Date -0001-11-30
File details
MD5 a7e76e8020bf7d91bd504d941df14d42
SHA1 8ceadb9a1879e703f3538cfbd4634dbd2710eb3a
SHA256 6db95c0b37d7690ee6eb70d22b13af8f7eccbdabf8fda70a41cb6bec800f4e4c
CRC32 fe671d31
Example file location C:\Windows\Help\mui\0409\