Fix mmcss.dll Errors

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

mmcss.dll 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 related errors on your device. You can also download mmcss.dll file compatible with Windows 8.1, Windows 8, Windows 7, Windows Vista devices which will (most probably) allow you to solve the problem.

Compatible with: Windows 8.1, Windows 8, Windows 7, Windows Vista

User popularity

3.1 Scanning for malicious software
3.2 System and driver update
3.3 System File Checker tool
3.4 System recovery

4 Download mmcss.dll

4.1 List of mmcss.dll file versions

File info

General information
Filename	mmcss.dll
File extension	DLL
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.)

Most common mmcss.dll file related problems

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

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

mmcss.dll

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

Problems related to mmcss.dll 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 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.

How to fix mmcss.dll errors in just few steps?

Remember, before taking any action related to system files perform a backup copy of your data!

mmcss.dll 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

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with mmcss.dll 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.

Installing relevant Microsoft Windows patches and updates may solve your problems related to mmcss.dll file. Use dedicated Windows tool to perform the update.

Go to the Windows "Start" menu
Type "Windows Update" in the search field
Choose the appropriate software program (name may vary depending on your system version)
Check if your system is up to date. If any unapplied updates are listed, install them immediately.
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 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 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 file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the mmcss.dll file with properly working version. To use the tool:

Go to the Windows "Start" menu
Type "cmd" in the search field
Locate "Command Prompt" result – don't run it yet:
Click the right mouse button and select "Run as Administrator" option
Type "sfc /scannow" in console prompt to start the program and follow the instructions

Step 4: Restoring Windows system

Another approach is to restore system to previous state, before the mmcss.dll file error occured. In order to restore your system, follow the instructions below

Go to the Windows "Start" menu
Type "System Restore" in the search field
Start the system restore tool – it's name may differ depending on version of the system
The application will guide you through the process – read the messages carefully
After the process has finished, restart your computer.

If all the above-mentioned methods failed and the mmcss.dll 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 file

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

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

Windows 8.1: C:\Windows\System32\
Windows 8: 1: C:\Windows\System32\
Windows 7: C:\Windows\System32\
Windows Vista: C:\Windows\System32\

If the steps did not solve your mmcss.dll 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

System Windows 8.1

File size 74752 bytes

Date 2014-11-21

Download

File details
	MD5	00cc7a6ffc120fc1b1f406b3ef6e2659
	SHA1	53c44c1859f47fc19fd0c3109e2b2dd838355492
	SHA256	5adb0c628eecc3967f106228dce5c27211073a3a93cf88a36fb7e04137f3e979
	CRC32	d4ccba89
	Example file location	C:\Windows\System32\

Filename mmcss.dll

System Windows 8

File size 60928 bytes

Date 2012-07-26

Download

File details
	MD5	d3c9785d97c09ee702fc06bde74c7fe0
	SHA1	586b90ff4d75b292fd396bd7318fa62d699c7e91
	SHA256	db5b5625ff41fa977be939ad662cb781d65b7def0777238c7a2fe58a01b63349
	CRC32	df5edb20
	Example file location	1: C:\Windows\System32\

Filename mmcss.dll

System Windows 7

File size 67584 bytes

Date 2009-07-14

Download

File details
	MD5	e40e80d0304a73e8d269f7141d77250b
	SHA1	7bc695a1aaebfbb73ff9cbe801218e8bc02f4ee9
	SHA256	0db4ac13a264f19a84dc0bced54e8e404014cc09c993b172002b1561ec7e265a
	CRC32	f4b96381
	Example file location	C:\Windows\System32\

Filename mmcss.dll

System Windows Vista

File size 37888 bytes

Date 2008-01-21

Download

File details
	MD5	3cbe4995e80e13ccfbc42e5dcf3ac81a
	SHA1	5295a11e4ac27bf9b4bc67b6018685755c5f0ece
	SHA256	18b0e3e83e41c80809e8140f4c90ab051566c84dd891ea411746ea74e6eaf053
	CRC32	7ecb4e3f
	Example file location	C:\Windows\System32\