first of all, I have an Intel core i7 920, MSI X58 Platinum MB, 6GB of Patriot DDR3 RAM, a 750mw power supply, an nvidia Geforce GTX 260, and a 500gb HDD. a couple days ago I cleaned out the inside of my case with an air hose, got all the dust out of there. I removed the CPU fan, and the RAM in the process. hooked everything back up, and am now having problems with the system freezing and or just restarting on it's own. Usually happens when I make it earn it's paycheck, like logging into World of Warcraft, but it's happened while booting u, surfing the internet, and running a system restore, so it seems to happen whenever it wants to. I took the system to Best buy, they ran a hardware diagnostic and everything checked out. Brought the system home earlier tonight and am still having the same problems. The cool thing is the Geek Squad accidenall left their diagnostic disc in my disc drive, so I'm running my own checks In fact it froze up while it was testing the RAM. my system is 2 years old, this same problem happened then too when it was brand new, but I can't for the life of me remember what the solution was. my question is, if everything is supposedly working fine, why would my system be freezing up? CPU temp is not an issue here, this only started after I cleaned out my case, and all my fans are running perfectly, and everything is connectly correctly.