We have a Windows 2003 domain with 4 domain controllers. We are experiencing an issue I have never seen before on a domain controller. About every four to five weeks, the domain controller system date and time starts advancing into the future on its own. When this event occurs it is always over the weekend and Monday morning the domain controller date and time are literally advancing before my eyes. You bring up the system clock from the system tray and you can seen the clock hands, the months and year advancing into the future. This happens over the weekend and on Monday morning the year is 2064 and climbing. Of course we start having authentication issues because the domain controller is out of synch with the other three domain controllers. No viruses/malware were detected on virus scan. I updated the Windows OS and updated the server firmware. The server receives its time from a network time server that operating normally. Has anyone ever experienced this issue? If so, how did you resolve it.