By default, WindowsXP synchronizes your computer time with a time server once a week. If you would like to change that interval to something more often such as once a day, go to this website and download the file: http://www.dougknox.com/xp/utils/xp_inet_time.htm This if for WindowsXP only. I have used it for years, works great. Totally free. 73, Bill W6WRT