I apologize for the lack of detail.
This is a laptop.
I have not witnessed it restarting. You are suspecting temperature issues?
It does not feel warm, actually.
I am running a hardware diagnostic. Hopefully this will test the fans.
...It's the hard drive.
Thanks for your assistance.
I will rate your answer favorably, based on your overheating idea. It was a very logical thing to test for, and I was hopeful that this was the answer. Unfortunately, it is now very obvious what the issue was, based off of the horrible noises coming from the hard drive.