Ok, here we go so please bare with me. Got a Dell 8200, 2.53 p4. 850 chip set. After running 3d bench mark noticed that ht was diabled. When I ordered from dell that was the selling point at the time about 1 1/2 ago. Anyway had bad virus so I reformated deleting all partions, then reinstalled windows xp pro. I noticed it never performed as good as when I first got it from dell, but could never pin down the performance problem. After running the bench mark I think this is my problem. So I try to enter bios to enable but don't see the option for enableing it. Does anyone know what I can do? Just can't stand to call tech, my god please don't make me call tech....lol. I'm using f2 key to enter the bios, it shows normal stuff like clock time, cpu info, ram, and so forth. Is this the right key? Any help from you pro's would be highly appreciated! Thanks all!