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How to Repair sysclass.dll.mui? Download Now

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

sysclass.dll.mui file System Class Installer Library. The file was developed by for use with software. Here you will find detailed information about the file and instructions how to proceed in the event of sysclass.dll.mui related errors on your device. You can also download sysclass.dll.mui file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista 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

File info

General information
Filename sysclass.dll.mui
File extension MUI
Description System Class Installer Library
Software
Program Microsoft® Windows® Operating System
Author Microsoft Corporation
Details
MIME type application/octet-stream
File type Dynamic link library
System Windows NT 32-bit
Copyrights © Microsoft Corporation. All rights reserved.
Character set Unicode
Language cod English (U.S.)
sysclass.dll.mui

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

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

sysclass.dll.mui

Error

Application could not be started because sysclass.dll.mui file is missing. Reinstall the application to solve the problem.

OK

Problems related to sysclass.dll.mui 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 sysclass.dll.mui 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.

sysclass.dll.mui 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 sysclass.dll.mui 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 sysclass.dll.mui 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 sysclass.dll.mui 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 sysclass.dll.mui file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the sysclass.dll.mui 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 sysclass.dll.mui 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 sysclass.dll.mui 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 sysclass.dll.mui file

The last solution is to manually download and replace sysclass.dll.mui 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 sysclass.dll.mui file.

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

  • Windows 10: C:\Windows\System32\en-US\
  • Windows 8.1: C:\Windows\System32\en-GB\
  • Windows 8: 1: C:\Windows\System32\en-GB\
  • Windows 7: C:\Windows\System32\en-US\
  • Windows Vista: C:\Windows\System32\en-US\

If the steps did not solve your sysclass.dll.mui 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 sysclass.dll.mui
System Windows 10
File size 8704 bytes
Date 2017-03-18
File details
MD5 9462d2b8983d1b78731c269e2f98fe51
SHA1 47a05e219cb256cfb745c4efb084f5d1d95ae1b8
SHA256 faa6f523cec327cbe19863ee439a07f09a783dbfe38145a6e1f263c4e2be0ffc
CRC32 d63d59b1
Example file location C:\Windows\System32\en-US\
Filename sysclass.dll.mui
System Windows 8.1
File size 8192 bytes
Date 2014-11-21
File details
MD5 b77695175bdee50a940cc063adcb0290
SHA1 17f574906a11f1a153153db2807dd70984c23327
SHA256 4b427af7c037b4d95b150afd07e8909ed4b22bf6ea64b3c26d559c8284197c67
CRC32 0882d995
Example file location C:\Windows\System32\en-GB\
Filename sysclass.dll.mui
System Windows 8
File size 8192 bytes
Date 2012-07-26
File details
MD5 82eedf34086d372092db52419c360a89
SHA1 a2cf99f4ee3bac88d3432b085824baa280ef3897
SHA256 b4572ca16af3087a410fee8c5aa6cf0aa27beb40894811ddee91e54ceeddc664
CRC32 93a4ad1a
Example file location 1: C:\Windows\System32\en-GB\
Filename sysclass.dll.mui
System Windows 7
File size 8192 bytes
Date 2011-04-12
File details
MD5 16516d50b0d4e3ea16072b9191757d29
SHA1 8d55ddef5f912795588739dc01cdaa5e32d7fd4f
SHA256 c92c8b18b76e987d1c31828f7eb1de1ee96076fc8e7850e214a01958cb8ed366
CRC32 4983cf00
Example file location C:\Windows\System32\en-US\
Filename sysclass.dll.mui
System Windows Vista
File size 8192 bytes
Date 2006-11-02
File details
MD5 11f5ac1b54d3f420a076873456479a0e
SHA1 66936ecb7751e7657b66f4d9a8bf39954c8904e7
SHA256 b5d00a39f1ce8d9da498f71ac5f0d6061ec1fcd12c88a6516ce1f3d8185852ff
CRC32 d54e4915
Example file location C:\Windows\System32\en-US\