computer clock loses time
My Sony Vaio laptop clock loses time:
If I leave it off for weeks, it will start up with a date and time way in the past.
If I update the date and time, I see that even as I do work with it, it starts losing seconds, and in an hour of being on, it will lose like 10 minutes or so.
I'd imagine that if the battery had a problem, it would lose time while it was turned off, BUT, it happens even when the machine is up and running!
could this be a hardware problem, or a corrupted registry problem, or some virus?
I have Norton Internet Security, and I have done a Live Update for virus definitions several times, and Norton says there are no viruses.