Reports have been flooding the web that the network transfer speed of Windows Vista drops to a low level whenever you start to play music on the system.
If you are running into the issue you are probably not considering that audio may have the effect on the performance of your network transfers as it seems highly unlikely that the two would clash on the system.
It is very likely that you start to investigate other possible causes first. Eventually, you may come to this page after you have searched the Internet for a solution, and that is when you find out that audio is in fact the cause of the issue.
More precisely, it is a new service that Microsoft calls Multimedia Class Scheduler service or short MMCSS.
Mark Russinovich described the technical process on his blog explaining that 'when a multimedia application begins playback, the multimedia APIs it uses call the MMCSS service to boost the priority of the playback thread into the mealtime range' which basically means that every other thread - including network transfers - see a performance drop because of this.
The following method has worked for most users who have experienced slowdowns in network traffic in Vista while music was playing on the system.
Update: Microsoft has fixed the issue in newer versions of Windows Vista and newer versions of the operating system. You should not run into this issue anymore when you play audio on your system, provided that you have installed the latest Windows Vista service pack that the company has published.
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Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.