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 🙁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! 🙁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.A few Googleminutes later I found the solution:Total time wasted: 2 hours. Can I send you the bill, Bill?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!