Hi all, I have an old Toshiba Satellite laptop (that belongs to a friend who have abandoned this machine for me to fix) that I'm going to replace the CMOS battery for. Right when I turn the machine on it tells me to press F1 to enter BIOS because of CMO read error or CMOS checksum error. I am convinced that once I change the battery this particular problem will be gone. After all it has been used for many years. Furthermore I have some suspicions though about the nature of this problem. The reason my friend ditched this machine is because it would not boot up completely - At some point while the winxp logo is shown during the startup process, a blue screen appears for about a TENTH of a second, and the computer just simply resets/restarts itself. My question is, could this problem have anything to do with the fact that the CMOS battery is low? Any advice or insight is appreciated. p.s. - the laptop itself is spyware/virus free.