English isn't may native idiom. The battery only works when computer is powered off, if there's no charge on it, on boot time you will be warned about this, and, generally, with something like this: "CMOS is out fo date, press F1 to continue or DEL to setup". All hardware access is managed through BIOS (Basic InpuT Output System), so, must have a sync between hardware and software (Windows). The quartz crystal that pulse, givin the frequency that processor works, among other things, must be the cause, I presume.