A previous discussion put this down to a weak CMOS battery and gave a guide to how to change the battery. I am not technical and would rather leave the battery as it is. If I adjust the clock each time I turn my PC on, can I carry on using my PC without any problems?
It could lose ability to detect settings for the hard drive and prevent booting. Change it, half an hours work and a couple of £'s and you have no more worries for 2-3 years, even longer if your lucky. It really is not much more difficult than changing a watch battery.