I have Win XP Pro, Service pack 3 and all is current with the latest updates.
My printer was not printing every other page as it used to do so I called Epson.
The Tech had me uninstall my Epson printer with add remove and also from device manager. Then he had me download the latest printer drivers from Epson and them the subject title error message came up. He asked me to call Microsoft as he had no idea of what I could do correct this problem.
The balance of the error message is:
System file is not suitable for running MS-DOS and Microsoft Windows Applications. Chose Close or Ignore
Any help will be appreciated.