I have an Acer Aspire 5610Z where the system clock stops if I turn off the laptop. I then have to change to the right date in windows manually first, and then manually sync with a ntp server to get the right time. If I leave the computer on, it will automatically sync with the ntp server as long as the date is not scewed by more then 24 hours. That is what often happens when I turn off the laptop, the clock stops counting for the amount of time the computer is off - often more then 24 hours. I use Windows 7 on the laptop.
Is there some battery or something on the main board that I can change?