Good evening to everyone! I purchased the PC in 2007, I installed win7pro x64. The PC stops every 10 minutes in this way: the video stops for 2 sec then goes off for 1 sec. and comes back on, until the next block.
Run the diagnostics on the system to see if the hardware is failing. Also, update your bios as well as your video card drivers. If that does not resolve the issue format and reinstall Windows. To run the diags on the system you can start the computer and tap the F8 key. Choose the diags from the list.