HI,
If you can get to the BIOS, change the boot sequence to load the CD and run System File Checker.
It's been a while since I had to do that from the CD, but it should give you that option to Repair.
This is not a re-install, but you may have to run Windows update afterwards.
SFC will look for missing or corrupt files and replace them.
If you have a floppy disc on the system, you can run it from a Command Line: cmd, then sfc/scannow. It will prompt you
That said, you could have a hardware issue. You can try re-seating the ram and testing the power supply.
Pegger 3D.