Jim - Thank you for your repsonse on Pete Dowsons page. Your suggestion is to uninstall Acceleration and reinstall SP1 from MS, and then Acceleration. I understand, but have one quesiton. On control panel under ADD/DELETE PROGRAMS it shows Microsaoft Flight Simulator X: Acceleration Size 232.00 MB..Flight Simulator X Service Pack 1 ..Flight Simulator XThe only uninstall it allows is the first line. The two addins below say "This update cannot be removed".By uninstalling the first line, am I only removing Acceleration or the entire FSX program?

Hi,You need to work backwards. Uninstall Acceleration and then SP1. Install SP1 stand alone and then Acceleration.Thanks,