A few Googleminutes later I found the solution:Total time wasted: 2 hours. Can I send you the bill, Bill?Recently had a PC with XPSP3 and an Asus P5GC-MX/1333 in it my hands. Problem: No audio at all, the Realtek High Definition Audio Drivers did not want to install. At the end of the install an error message pops up ( Realtek High Definition Audio driver install has failed ) and then the installer closes. Urgh! 🙁Go to Device Manager/Device Drivers Under System Devices find Microsoft UAA HD bus driver Now, first disable it … … and then uninstall it. Close the Device Manager and run the Realtek setup Tadaa, it works!After some fiddling in Device Manager (remove the darn thing and such) accompanied with some reboots I hit Google and read something about the KB888111 hotfix from Microsoft. After finding it, it couldn’t install as this one already’s included in SP3. No.luck 🙁Eventually I tried with the the latest drivers from Realtek. The error was still there, but a more specific one came out: HD Audio Bus Driver Failed to load: 0xE0000227 . Aha, a clue!Fix to the "HD Audio Bus Driver Failed to load: 0xE0000227" & "Realtek High Definition Audio driver install has failed" Errors.