Hi, I have a dell dimension 4300 p4 384 megs of ram made in about 2001 running xp fully patched anyway there is a green box ( heatsink i think?) that covers my processor to "channel" the air from the air over the processor to cool it down. well somehow this green cover has been lost i have tried to call dell but the hold times were killing me so i hung up... but my processor is running pretty hot and im worried about a meltdown is there anything i can do?