Whenever I try to run an .exe file in Windows XP it give me "----.exe is not a valid win32 application". This error seems to be universal because none of my startup programs startup (though they don't return an error) . .exe files on removable media and shared drives do not execute either. In addition to this when I try to shutdown/restart from the start menu XP returns an error saying that "You don't have permission to shut down this computer." I've tried booting in safe mode and everything works there.