Freezing but not sure why

Hey guys, I've been a long time member of other electronics forums over the years but never really visited this place much. Since most of them are dying out and this one still seems to be going strong I figured it was time for a change.

Anyway, I'm in the Navy and built my own computer. Had its ups and downs but most recently it was working really well. I went out on a 2 week underway with my ship and when I came back my computer was messed up. No one touched it but now it's started locking up on me. It doesn't unfreeze.

Here are the steps I've taken to try and fix the problem:

1. I cleaned the entire computer physically, inside and out, removing any trace of dust and wiped down each fan blade myself.

2. Ran anti-virus, anti-spyware using upgraded versions of BitDefender and Spybot.

3. Updated my video card's driver and any other drivers I thought might be out of date. I do this manually as I don't know any really reliable programs so maybe I've missed something.

4. Ran Windows Memory Diagnostics to check the condition of my RAM and it found no errors.

5. I've used programs like SpeedFan and the computer's own temperature reading on my case to see what might be overheating. While the GPU is running warmer than normal, nothing is TOO hot. On freezing the computer is never running hotter than 30 Celsius.


While doing this has helped a bit, it's still freezing. I don't know why. I'm hoping for some opinions.

I'm thinking Overheating is still a primary concern for me. I live in San Diego and it's very warm here right now, and obviously since I was gone I wasn't able to keep my place as cool as I'd like it for using electronics (especially with no A/C!). The computer has two case fans and I'm using Arctic Cooling Freezer 7 Pro inside, but nothing really advanced in the way of cooling. Still, this was enough for it to work without freezing before I left.