I have every service turned off on Windows XP Pro SP2 almost. The ones that I have on right now are Cryptographic Services, Plug and Play, Remote Procedure Call. Server. Windows Audio, Windows Installer, and Workstation. When I try to install it it says "System failed to launch installation engine: The RPC server is unavailable." What service do I need to turn on to have it install? These are the Radeon 9.3 drivers for a Radeon X200. I also have this same problem when trying to install AvP2.