Stop system date been changed

The answer is yes! However there is no easy way to do it and not knowing exactly what you are doing may cause system problems, since to do that you need to use the registry entries (Win98/XP/2000).

Perhaps the easiest one to do it in would be Win2000, just by limiting a normal user his abilities to alter system configuration; but to do that, you must have all the computers in a Domain! So the first thing you need to do is set up a Server and the others as clients; I suggest you use Win2000 machine as the Server, mainly because that is what that OS is made for. Once you have it up and running go to Start/Administrative tools/ACTIVE DIRECTORY and study all the possibilities you have with users and you will see how much power you have.

Any problems contact me at: iotti@hotmail.com

If all your machines were in a domain, you could set up a time server, and synchronize them by it. If you had Internet access, you could synchronize them to an external time server. Windows 2000 and XP already have the Windows Time Service, which uses SNTP over port 123. For your 98 machines, you would have to use net time (net time \\ /set /yes) either in the autoexec.bat file or as a shortcut that will run minimized and close on exit.

The Knowledge Base has several articles on time synchronization.

http://support.microsoft.com/default.aspx?scid=kb;[LN];216734

and

http://support.microsoft.com/default.aspx?scid=kb;[LN];314054

This has some clock synching information:

http://fhctech.org/fhc/networking/management.htm

If you want to sync from the Internet, there are many utilities for free at CNET or ZDnet.