Reboot xp without disc

What is a monitor system file? If you mean the drivers for the monitor, try this: Reboot the system. Press F8 when the Windows boot process starts, then select Safe Mode or Safe Mode with Networking.

This will bring you into a mode that used the basic low-res driver for your monitor. You could then visit the site of the maker of your video card and download the driver.

Please let us know if I interpreted your question correctly or if you are asking something else - provide a little more detail on what was erased, how, and what messages you are seeing.

If you don't know the make of your video card or onboard graphics, let us know and we will figure out what drivers to download.