|Thermal paste doesn't harden or dry so it was probably a thermal pad. Pads are made of a "phase change" material which is similar to wax...hard when it's cool, soft when it's warm. What you should have done was run the system for a bit to soften the pad, then the heatsink would have been easy to remove. You apparently tried to remove it when it was cold & ended up ripping the CPU out of it's socket.|
You're going to have to carefully separate the CPU from the heatsink, then remove ALL traces of the old thermal pad from both the CPU & heatsink. Make sure you didn't bend any of the pins on the CPU...if you did, carefully straighten them. If you don't have thermal paste, you'll have to buy some. Radio Shack sells it for about $3.
Find your CPU on the following list & apply the paste according to the instructions:
Do NOT re-use the old pad & do NOT install the heatsink without thermal paste!