I had to reinstall Windows XP and everything else including FS2004. When I try to install PMDG 747 validation works but when I try to accept the End User License Agreement I get an error message: "Installation cannot continue. You do not have Flight Simulator installed". But Flight Simulator is installed. I just finished running it! Its listed in "Program Files" and also the "Control Manager". Not sure what the problem is>

"Always sit at the rear of an aircraft,because they always find the Black Boxes"http://www.oncourse-software.co.uk/forum_images/fdc_beta.jpg]http://www.oncourse-software.co.uk/forum_i...e_supporter.jpg]Jerry,Same thing with me,says you have to manually point to FS,but no can do,never had this before and yes FS is installed ok.Regards DaveProblem solved....Just download the Registry Repair Tool from Flight1 software and it corrects this problem.