What should I do if the Win7 system has broken noise?

The sound of Win7 system is very abnormal, there is noise or broken sound, what should I do?

1. Check if the sound card driver has been driven or updated. You can use the driver wizard or drive life to check online.

2. Check the system sound service process.

In the win7 system, there are three voice-related services

1) Multimedia Class Scheduler (mmcss) service, in the process is svchost.exe, this service is the priority of the management task Mainly for multimedia, but it will account for a lot of resources on the computer, it is recommended to disable.

2) windows auto service, this is required to be turned on, but when the Multimedia Class Scheduler (mmcss) service is turned off, this service will also be closed, resulting in no sound on the computer, so you can use the Multimedia Class Scheduler and windows. Auto disassociation.

3) The two service disassociation methods are as follows:

Click Start--Run--Enter regedit, press Enter, open the Registry Editor, and navigate to: [HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet /Services/Audiosrv]

Double-click to open the DependOnService project on the right, delete and save the MMCSS.

3, the settings will not take effect after restarting the computer, then close and disable the Multimedia Class Scheduler in the service.

After the above modifications, you can find that the sound of the win7 system is normal, and there will be no noise or broken sound.