My son's Presario C500 has a time clock problem. It repeats the same hour over and over. Instead of going to 10:00, at 9:59 it goes right back to 9:00 and repeats the cycle. I have tried to find a new timedate.cpl driver but, I haven't been able to find one. I'm not sure that's the right driver either. Microsoft Vista website has been no help at all. Has anyone run into this problem?