Hey everyone. I needed some pointers on how to remove the HSF of a Socket 478 CPU. It's my dad's PC and the CPU HSF is clogged with dust. I've managed to remove the whole assembly from the mobo but I'm not sure how to separate the HSF from the CPU. I've tried twisting it off but it doesn't seem to help and I'm scared of pulling any more since I fear I might damage the CPU and it's very hard to find a Socket 478 CPU out here. Any pointers would be really appreciated and thank you in advance for any help. P.S.->It's a Pentium 4 1.7 GHz Williamette core CPU, if that helps in any way.