Today I applied some Arctic Silver to my processor (Athlon 2800 XP). I had cleaned off the original thermal grease according to the manufacturers directions and applied a small amount as directed. I put everything back together and the CPU is running about 8 degrees Celcius cooler than before. However the problem now is the computer randomly freezes requiring a hard reboot. At first glance it would appear to be heat related as it will go for a while after a cold start and once rebooted due to a freeze it takes less time until the next freeze but as I said the CPU is much cooler than it was before. I tried a system restore (Windows XP Pro) but that has never worked for me and didn't this time no matter what date I tried. The next thing I tried is a reinstall of windows over the current installation. The installer has frozen quite a few times and has required hard reboots which of course makes the setup take even longer. I don't know what to try next and I'm not really sure what the problem might be. Any help would be greatly appreciated.