So people of the forums, I need some real help. I have my custom built computer, which the specs you can find on my profile page, and Win7 64bit HP. Just recently, within the last 2 weeks, my computer started requesting for a pre-boot disk check for consistency. So I was like whatever, and let it do its thing, and I figured that since its a 640GB that it would take a while, so I turned off my monitor and left it, for 3 hours. Came back it was still on that same window, which I can not find a picture of, but it is the usual command prompt pre-boot window, and it was frozen at the countdown (1). And I was like this sucks, so I turned my computer off and restarted, it asked for the pre-boot check again, I watched it this time, and it froze at the countdown. I watched it closely for about 30 minutes and it didn't change. I honestly have no clue what is wrong, I have ran a security scan from all 4 of my security programs(ClamWin, Norton 2010, Spybot-Search and Destroy, Advanced System Care 3.5's security feature), all of those came up clean. So help if you can, many thanks in advanced.