She leaves it run most of the time but when she does turn it off, she simply pushes the on/off button but does not unplug anything.
I think that a clock losing a minute or two occasionally is not a big deal. That isn't my main concern. It's the fact that this has happened on two totally different computers, this one now is a brand new one, and I've had several computers that I've not had to change out a CMOS battery in four years. Her last computer I had to replace the batter three times in one year.
My main concern is the fact that when she starts closing windows, it's like they disappear in squares, one at a time altho sometimes they close perfectly normal, but when they close, it's like they kind of "dissolve" from the screen instead of just a clean "zap" and they're gone. Sometimes, a small square, say about 2 inches x 2 inches, will stay on the desktop and in order to get it go away altogether, she has to reboot.