My computer can be on for days and the screen can be frozen at say 10:10 a.m. this morning, after I had to restart, because nothing would work. Not even ctrl alt del. I have updated drivers, bios, and all windows updates. It is not overheating until after it has been left frozen for about 2 days. When it is restarted the cmos tells me the time and date are wrong and to hit f2 to load defaults. The battery is new and installed correctly in the mobo. I don't know where to go from here. Help!?