Greetings, salutations and all that!

Hello to all,
First, let me begin by wishing all a fortuitous future. Now, here's my dilemma.
At work, we have an antivirus program that is supposed to update all the PCs on the network whenever the update comes out. Unfortunately, this only happens when the user logs out and back in, or if the PC is rebooted. We have a lot of PCs that this never happens, so I would like to write a script that will run the update program. By the way, my network has Windows 95/98/2000 workstations.
So, my questions are: What command can I use that will work in this script or where can I go to learn?
Also, any tutorials out there that break down WSH into an easy to learn format?