1. Restart the computer first, and then press the F8 on the keyboard when the computer is powered on to enter into Safe mode, then double-click to open the Computer icon on the desktop, and then go to the path c:windowssystem32drivers in turn, Then find the Hdaudbus.sys,hdaudio.sys two files and delete the two files. It should be noted that if there are other had files, they also need to be deleted.
2. After that, return to the desktop location again, then right click on the computer icon, select Management, access to the Computer Management interface, expand the left menu of Device Manager, and then in the right-hand window to find "Microsoft UAA bus Driver for the high Definition Audio option, double-click the entry, select Deactivate, and then click the key again to select Uninstall removal.
3. After the completion of the restart of the computer, after the boot will be prompted to find new hardware, according to the prompts will be hardware installed on the normal use of the sound card.