Solve the pop-up and noisy problems in Windows 7

When watching HD movies in WinXP, the screen is smooth and the sound quality is good. However, after upgrading to Win7, although the screen is not stuck, there may be bursts of sound and noise, this is also true for upgrading the driver and changing the video player. The hardware fault can be ruled out normally in WinXP, and even if the driver is updated with sound or noise, there is no driver compatibility problem.
In Windows 7, Microsoft gave a higher priority to multimedia playback files and tried to optimize the performance of multimedia (playback) by controlling the CPU. This optimized the high-definition performance for mainstream players. However, for netbooks or old ones with low configurations, it may bring negative effects, such as false crashes when the CPU usage is high, or burst or noisy when playing HD videos.
The solution is to cancel the playback priority of the Win7 video by entering the Registry Editor, expanding to HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ services \ Audiosrv, and double-clicking the "DependOnService" name in the right window, then, delete the "MMCSS" value in the dialog box. Www.2cto.com

Exit Registry Editor, enter "msconfig" in the "search programs and files" box in the Start Menu, press enter, and switch to the "service" tab, locate and cancel the "Multi media Class Scheduler" service item.

Click the "application" button and restart the notebook. When you play a HD movie again, the sound will no longer be dull. Note: Multi media Class Scheduler this service is a simple explanation I personally think: the multimedia Class Scheduler Service (MMCSS) allows multimedia applications to get as much CPU time as possible. Emphasize that the "sound burst" and "noisy" mentioned in this Article do not refer to the problems that occur when playing high-quality MP3 files. However, you can try the same method to solve problems that occur during playback of high-quality MP3 files. This article is from Wenqi's ladder