Every time i start fsx and i pick the MD11 or my 747 in the airplane selection screen it crashes to desktop if i try and fly default airplanes it fine and i don't know why i have no other addons i have tried reinstalling it a few times with no luck. i have the c++ 2005 c++ 2008 32 bit and the c++ 2008 64 Bit installed i don't understand what is going on any help would be helpfulamd 5600+geforce 9800GTX6 gigs of ram500 mb harddrivevista home premium 64bit

Does the installation ask you to trust certain dll files first time run? Also, try this: http://ops.precisionmanuals.com/wiki/FSX_Trust_DLL_PolicyTry deleting all pmdg files and folders in between uninstall and reinstall, maybe too: http://ops.precisionmanuals.com/wiki/PMDG_...G_dll_files_CTDWhen you run out of ideas, be sure to email pmdg support... be sure you get an automatic response.