The popping noise problem of Windows7 when playing HD movies is

. Step 1: Run the registry editor, expand to HKEY_LOCAL_MACHINESYSTEMCurrentControlSet servicesAudiosrv, double-click "DependOnService" in the right window, and delete "MMCSS delete" in the pop-up dialog box. ;.
After the modification is completed, save the settings to exit. This modification is only the first step. To solve the problem completely, you need to proceed to the next step.
Second step, enter msconfig in the Start menu <; Search programs and files & rdquo; box, in the pop-up dialog box, switch to the "Services" tab, find and uncheck "Multimedia Class Scheduler" .
After the modification is completed, click the “OK" button to save the settings and exit.
Restart the computer so that the above two-step modification takes effect.
At this time, once again tested under Win 7 system, playing HD movies no longer has the problem of "slow voice". You can go online happily!
The above test was tested in the Win 7 Ultimate 32-bit system.