lug.CHM - How to Fix? Download Now

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

lug.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 lug.CHM related errors on your device. You can also download lug.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 lug.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 lug.CHM file. lug.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 lug.CHM file. If you encounter one listed below (or similar), please consider the following suggestions.

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



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


Problems related to lug.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 lug.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.

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

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

Go to the folder where the file should be located and paste the downloaded file. Below is the list of lug.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 lug.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 lug.CHM
System Windows 8
File size 24163 bytes
Date 2012-07-26
File details
MD5 d9af0fc89de798fd53ae31abc820b547
SHA1 4079f82bdc2721257133b29ecf6142314b1fec4f
SHA256 912739beb45d39a042546462be2b091cda21920bee98b761c83d0f9b509bb92f
CRC32 7675d946
Example file location C:\Windows\Help\mui\0409\
Filename lug.CHM
System Windows 7
File size 62468 bytes
Date -0001-11-30
File details
MD5 2380526cd4dbd755a97ebceed9e1c6f9
SHA1 56e781514df32df5a2b82e9a759a8ec30fe68c10
SHA256 3ac8a8904a2a893be70808cc1bc5140aebdd3ef11ec92c07a624ad73279e5320
CRC32 f94914b1
Example file location C:\Windows\Help\mui\0409\
Filename lug.CHM
System Windows Vista
File size 63142 bytes
Date -0001-11-30
File details
MD5 12eca7a6daa9e0226ad4eb516f19f6ea
SHA1 20e37ec7cf440a7b32423bfdb84a182b5fe94de0
SHA256 e6b457c085c12a1a052c198545520ce301cf1cc6613c6bcda15f4038ccb72a99
CRC32 0dde24de
Example file location C:\Windows\Help\mui\0409\