Hi mrdliberato, welcome to SAF
Sounds like a hardware issue to me, probably some overheating or a bad RAM stick (this is the most probable)...
You may try to test it using Memtest, from
http://www.memtest86.com/ (it runs in DOS mode, as you wasn't able to reinstall Windows).
Let it perform check for some hours (all day or night long if possible). Any error during this test and you'll need to replace the ram stick.
Chris