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mmcss.dll.mui Informations - Download and Fix

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

mmcss.dll.mui file Multimedia Class Scheduler Service. 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 mmcss.dll.mui related errors on your device. You can also download mmcss.dll.mui file compatible with 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 8.1, Windows 8, Windows 7, Windows Vista

File info

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

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

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

mmcss.dll.mui

Error

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

OK

Problems related to mmcss.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 mmcss.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.

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

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

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

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

If the steps did not solve your mmcss.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 mmcss.dll.mui
System Windows 8.1
File size 3072 bytes
Date 2014-11-21
File details
MD5 2457d10cff37e35562d2922dc436f10f
SHA1 44456d742c3ee23e77d61e6bfadaedc4b315dee4
SHA256 15dd45fb0e1c2c588ee2cf209bdf82be96d41c00f6ef84d4f3133e71be306c12
CRC32 39b9db40
Example file location C:\Windows\System32\en-US\
Filename mmcss.dll.mui
System Windows 8
File size 3072 bytes
Date 2012-07-26
File details
MD5 71669c067944a9e2b8f2f7e50eab41bf
SHA1 f995869621d940470ed1ccc19319f2e85a368a16
SHA256 f975545ecf22b2645218cb0a48882780767d810ab5596f2f5d7ae6cec973a07d
CRC32 d80abce8
Example file location 1: C:\Windows\System32\en-US\
Filename mmcss.dll.mui
System Windows 7
File size 3072 bytes
Date 2011-04-12
File details
MD5 5f5517ebfe36014d01a60fcd0c96def1
SHA1 49a4a528fe7799e8ce8bbe3c404b4a5387364d59
SHA256 0cacc592f76b88616b8adeee41cb4a71fedd5fbc731e0507de49de04092f6b84
CRC32 a3d355d9
Example file location C:\Windows\System32\en-US\
Filename mmcss.dll.mui
System Windows Vista
File size 3072 bytes
Date 2006-11-02
File details
MD5 faeeabfd205760f5d6f6771ede4d5231
SHA1 d73a7fc676b901a92689da2d81ff6406cfbb4e2a
SHA256 480b93ff422ff592250c03c3f41ddb5f4fcb25b83822a9528f616705c5b25681
CRC32 be004a92
Example file location C:\Windows\System32\en-US\