best guess -
install FS in it's own directory (ie, c:/FS),
NOT in win7's /programs directory.
be sure to turn off all 'UAC' to the FS directory, and set folders for access for all computer users
install FS and correctly install updates
install ERJ. be sure to set the installer for 'winXP' compatability.
hope.
--



new 'rig' = Core2 Duo E8400 at 3GHz w/2GB : Windows XP w/SP3 : nVIDIA 9600GT 512MB
old 'rig' = P4 2.4GHz w/1GB : Win. XP w/SP2 : **MDAC 2.8 SP1 on Windows XP SP2** : ATI 9600 w/128MB
simmer since FS 1.0 for Apple Macintosh