My Realtek HD Audio Driver Won't Install

Set Computer to Boot in Safe Mode
1. Press the 'Windows' key and 'R' simultaneously. A run box will load.
2. Type 'msconfig' and press 'Enter.'
3. Click the 'Boot' tab and then click the check box next to 'Safe Boot.'
4. Click 'Apply' and then 'OK.'
5. Reboot the computer.
Disable Unified Audio Architecture
6. Press the 'Windows' key and 'R' simultaneously.
7. Type 'Devmgmt.msc' and press 'Enter.' The Windows Device Manager will load.
8. Double-click on 'System Devices.' The system devices will be expanded.
9. Right-click 'Microsoft UAA Bus Driver for High Definition Audio' and select 'Disable.'
10. Reboot the computer.
Uninstall Existing Realtek and Microsoft UAA Drivers
11. Press the 'Windows' key and 'R' simultaneously.
12. Type 'Devmgmt.msc' and press 'Enter.' The Windows Device Manager will load.
13. Double-click on 'Sound, Video and Game Controllers.' The sound devices will be expanded.
14. Right-click the Realtek audio device and select 'Uninstall' and then click 'OK' to confirm.Note that you may not have a Realtek audio device listed. In any case, uninstall any audio device that is listed under the 'Sound, Video and Game Controllers' section.
15. Double-click 'System Devices.' The system devices will be expanded.
16. Right-click the disabled 'Microsoft UAA Bus Driver for High Definition Audio' device and select 'Uninstall' and then click 'OK' to confirm.
17. Close the Device Manager.
18. Double-click the 'Realtek' driver installation to proceed with installing the driver.
19. Set the computer to boot back into Normal Mode by following the instructions outlined in the first section.
20. Restart the computer.