fsx.exe is not a valid Win32 application
I have just installed 'Flight Simulator X Deluxe edition' Using a Windows XP laptop. Because of its size (15 GB) I changed the 'installation' folder to one on an external hard drive. All was fine when I ran the simulator from the installation wizard, but when I tried to open it later I got the error message 'fsx.exe is not a valid Win32 application'. Can anyone please help?