Fix to the "HD Audio Bus Driver Failed to load: 0xE0000227" & "Realtek High Definition Audio driver install has failed" Errors

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! …