Important: If your PC is producing mmsys.cpl errors, you should check your Windows operating system immediately!

The file mmsys.cpl is part of the program unknown from the manufacturer unknown. Its task: mmsys.cpl unknown
mmsys.cpl is normally found in the directory %windir%\system32. If the file is located in another folder, you may have selected this path when installing the software. Under certain circumstances, this can also be an indication of a virus.

How to fix mmsys.cpl errors

If Windows notifies you of mmsys.cpl errors, the cause may be the result of damaged or corrupted registry entries.
In most cases, it helps to check the Windows registry for mmsys.cpl errors!

If this does not fix mmsys.cpl errors, we recommend uninstalling the program using the Control Panel and then running a scan of the Windows registry again.

mmsys.cpl slows down my PC!

Programs and files can have a strong impact on the performance of a Windows operating system. In some cases, this also includes mmsys.cpl.
In case of doubt, you should uninstall the program in question.
If mmsys.cpl is in the Windows startup folder, it can slow down a PC. We recommend that you turn off the automatic startup of this program.
Our advise: TuneUp Utilities disables unnecessary startup programs and Windows applications thereby minimizing the load on your computer. The software also fixes mmsys.cpl errors!

Is mmsys.cpl harmful to my computer?

mmsys.cpl is considered to be trustworthy. If the file is not located in the standard path, this may indicate the presence of a virus. Scan your PC with an up-to-date virus scanner. We recommend using the free antivirus software AVG Anti-Virus Free from

All information about mmsys.cpl:

The following information about mmsys.cpl is available.
Product name: unknown
Process name: Control Panel Drivers Applet
manufacturer: unknown
Website manufacturer: unknown
Standard path: %windir%\system32
Category: Part of the driver for your sound card.
Assessment: trustworthy