when assembling my system i used the stock cpu heatsink and fan (which i guess i'll refer to as hsf from now on) and arctic silver ceramique. i think the hsf is stuck to the cpu, and that's the reason i can't remove it from the motherboard. i think it's sealed really tight since it's been on there for about four years. i searched online for any solutions, but twisting it hasn't worked for me because it's not possible to twist the HSF very much while it's attached to the motherboard, it's connected at one end. it's an asus a8v motherboard, socket 939. aaaaaaaaahhhhhhh i don't know how to get it off *cries*