first thing to do, ground yourself by touching a piece of metal, usually ur PSU is a handy bit. Remove the heatsink and your CPU, then put ur CPU back in, and place the heatsink back on, and try it again. If this doesnt work, order some arctic silver 5, then when it arives, carefully scrape the thermal pad off with a flat piece of plastic, a credit card or a floppy disk both work. Then apply the thermal paste (a little bit goes a long way!) and try it