Try right clicking the shortcut in the Start menu. Select Properties, then Compatability.

Try Setting the compatibility to XP sp3 or Vista Sp2.

Also, try setting it to "Run as Administrator" from the same properties box.


I've found it's also worth doing this for the setup.exe files when installing programs that don't install cleanly, so i would be inclined to uninstall FS1 and then re-install it using compatibility mode and run as administrator.