I was cleaning out my computer today of dust and removed my fan from my CPU in order to clean it well. Since I have put it back on, I keep getting the overheating signal from my CPU when it is under a load. My BIOS has the warning sound set at 80C right now. When I go into the BIOS, I can watch the temp rise and fall depending on the load. What I need to know is, what the little glob of sticky grey stuff does that sits between my CPU and my fan? I figure that I need more of it now that I took the two apart but don't know what it is called or how much of it to use. The amount used when I first built the computer was just what was provided with the CPU and those directions were followed. I have read a few posts here that indicate that I should buy something that I then spread over the entire CPU and I wanted to know if that is accurate. What does that goop really do? Thanks so much for your quick reply.