Just upgraded with a new hard drive and a clean install of XP Pro. Also replacing an NVidia GF3 with an ATI 9800 Pro. XP Pro automatically installed its native NVidia drivers. There's nothing in add/remove programs and no references to NVidia in the registry under HKEY_CURRENT_USER / SOFTWARE or HKEY_LOCAL_MACHINE / SOFTWARE. There's also no NVidia control panel in Display properties or NVidia Driver Helper running in Services. Do I need to remove the native XP PRO NVidia driver with Driver Cleaner or uninstall the driver from Device Manager? Thanks in advance for any help provided.