History - I bought ATI 8.0 within 30 days of 9.0 coming out, so I have serial numbers for both 8.0 and then free upgrade to 9.0 As recommended, I uninstalled previous ATI 9.0 prior to installing the latest build, then rebooted PC. During installation, was prompted for serial # of 8.0 AND 9.0 - My PC knew I as upgrading. I don't remember being asked to provide both serial numbers before? How does it know I was upgrading? Is something left in the registry even after uninstall?