Solve the problem of popping noise under Windows7

When watching HD movies under WinXP, the picture is smooth and the sound quality is very good, but after upgrading to Win7, there may be a phenomenon that the picture is not stuck, but there is popping and noise, and the driver is upgraded and replaced. The same is true for the player. Since it is normal under WinXP, it can eliminate hardware failures, and even if the upgrade driver has popping or noise, there is no driver compatibility problem.
In the Win7 system, Microsoft gave higher priority to multimedia playback files, trying to optimize multimedia (playback) performance by controlling the CPU, which optimizes HD performance for mainstream books. However, for a netbook or a low-profile old one, it will have negative effects, such as a high CPU usage, a fake crash, or a popping or murmur when playing HD video.
The solution is to cancel the priority of Win7 video playback by entering the registry editor, expanding to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetservicesAudiosrv, double-clicking the name of the DependOnService” in the right window, and then deleting the value of “MMCSS” .
Exit the Registry Editor, type “msconfig” in the Start menu <;Search Programs and Files" box and press Enter to switch to the "Services" tab, find and cancel “Multi media Class Scheduler&rdquo ;service items.
Click on the "Apply" button to restart the notebook and play the HD movie again. There will be no dullness anymore.
Note: Multi media Class Scheduler The simple explanation I personally think is that the Multimedia Class Scheduler Service (MMCSS) allows multimedia applications to get as much CPU time as possible.
Emphasize, the "pop" & rdquo; & quoquo; murmur & rdquo; is not the problem that occurs when playing high quality MP3 files. However, problems that arise when playing high-quality MP3 files, and problems that occur when playing HD movies, can be tried using the same method.