A thought slimjim. Maybe the laptop is a few years old and has a run down cmos battery. These are the ones that look like a 10p coin, as used in remote controls. If you can enter bios settings at power up, there is a pc health setting which shows the battery voltage. It should be 3volts, if it is much lower the battery is showing it's age. They are easy to replace but the hard bit is getting the case apart so the dog can see the rabbit. A pc shop will do this in ten minutes, if you can find one that is still open.