My computer has been going on the blink for sometime now. Whilst using it, it will freeze up. You either have to turn off the power or you have to control, alt, delete. Control, alt, delete doesn't always work. ie sometimes it stays frozen. When restarting, it almost always goes to a screen that says, "Disc error press control, alt, delete. This process will repeat until, 1) it boots up and give you the option of starting in safe mode or regular windows. 2) It wont boot up and you have to wait. It seems that it will boot up first time ok. but after it freezes your have to fight with it to get it going. Well, this weekend it worked fine the whole time. Then if froze. Never would reboot. I found some diagnostic program by PC Doctor. I ran that and it tested the entire system. Every thing checked out ok. This program says its a software problem. My options seem to be to take it to the shop. Or, buy a new windows Vista program and install it. What do yo guys thing. Help??????????Please????????