[madljna]

Salam Alikum

Uninstall fs9 or fsx
open My Documents delete all files under Microsoft fs9 or fsx
download ccleaner right click run as administrator clean you
machine specially the registry
now reinstall fs9 or fsx note open the dvd or cd right click on the setup.exe run as administrator
from now on run applications as administartor

OBS

check your account that you belong the administrators group.