Multimedia Class Scheduler Service – MMCSS.DLL

Mmcss.dll is the Multimedia Class Scheduler Service. It installs as part of your Windows Vista operating system. This service helps media applications deliver glitch-free playback by allocating an appropriate amount of CPU time to that application. You'll find more information at http://www.microsoft.com/technet/technetmag/issues/2007/02/VistaKernel/. This service should only be stopped if it's causing you problems.

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