When I set up our 2003 SBS server a friend who has been working sysadmin for quite a while told me WSUS was "a must for any size of organization". So I installed it, and have been using it since.
However, I'm beginning to feel that it might be a bit overkill. Our company has five workstations, one laptop and one server. I barely ever block updates (happend once IIRC, and "extra games for Vista" type of update…). Also making sure the laptop is updated – which is almost only used when someone is on a trip, or giving a presentation at a customer – is a pain, since it is very seldom connected to the office network, neither physically or over VPN.
Do you see any point in me keeping WSUS?
Best Answer
If it were me, with only 5 desktops to worry about, I probably wouldn't bother with it. There are 3 aspects to WSUS that make it a necessity once you reach a certain size:
With 5 PCs: 1 is really not an issue and 2 you can probably deal with - If you only used boxed products, then it's incredibly rare that the critical and security updates will cause you any grief (Just don't install drivers from Windows update). 3 depends on how much control you give your users over their PCs and how much visibility you need over their update status. If you turn off WSUS, then I'd recommend giving your desktops a manual health check once a month, or so.