I bought a new fan/heatsink for my xp 3000+. I initially had a lot of trouble installing the fan/heatsink since the case is quite small and there isnt much room around the edges of the socket. After I installed it, the computer would start up, but then shut down after a few seconds. How do I prevent this from happening again? I inserted one side of the clip, then pushed down on the other end. My guess is that I didnt have the heatsink oriented the right way so the copper base would rest squarely on the core.