Over the last few weeks, my PC fan has been running more heavily than usual. I wrote it off to the weather since it has been so hot and we don't have AC. I turned off my PC during a three day weekend away, and when I got back, I turned it back on, and went to mow the grass. When I got finished about two hours later, I came in, logged into windows, and immediately started getting CPU heat warnings as it was approaching 95C. Not sure what was going on, I turned it off, took it outside and cleaned it. It was dusty, but not too bad. Brought it back in, and it booted to heat warnings. I opened it up, felt the CPU cooler and it was cool to the touch. The air blowing out the back (it's one of those sealed water coolers) wasn't terribly warm. Eventually, though the pc shut down.
I've ordered a thermal paste cleaning kit and some more paste. My hope is that whatever is in there is just not making good contact. Why it would have taken almost two years to degrade, I have no idea. Any have any thoughts on what else I could check? I don't over clock, so I don't have any settings there that I could back off.
Should I take the CPU out to clean existing paste off? I am not sure how to do it safely. I doubt I still have any protective cover for all the pins if I did take it out, which is what i am most nervous of. Thanks!