Win7 system sound card installation always fails how to solve

1, open your system on the disk into the windows-system32-driverstore-filerepository found in the Wdmaudio.inf_x86_neutral_aed2a4456700dfde folder;

2, right click on the point administrator to obtain ownership;

3, Re-enter (WDMAUDIO.INF_X86_NEUTRAL_AED2A4456700DFDE) folder to delete all the things inside;

4, download Windows7 sound card driver repair compressed package;

5, decompression windows7 sound card driver repair compressed package;

6. Copy and paste all the files inside to Wdmaudio.inf ... Folder inside;

7, reinstall the sound card driver (note to find the driver of their model OH);

8, restart the computer, the problem solved.