Locked Up

I finally was able to find out what was horking my desktop computer. The problem was every now and then the machine would just freeze. No rhyme or reason to it. It would, without warning, freeze up. The only way out of it was to power off and reboot. When I got a new monitor, it still froze but after a few seconds an error dialog would appear. Something about a video driver. A Ha! My first good lead!