It's downloading updates because it needs to, in order to fix the most-recently-identified vulnerabilities... (Read that statement any way you like) :)

You can change the Automatic Update settings by using the Control Panel, selecting "Download and notify only" mode, or set a time (of day) to automatically install updates. Start->Control Panel->Automatic updates.

Don't turn this off, though, or you'll miss all the security fixes that Windows needs to stay safe.

Jim

Assuming that you have antivirus software installed and don't use it for banking, browsing dodgy sites or email, you can probably turn off updates safely (if you want to).

I only ever install updates manually and I usually wait until there are about a dozen or so to install.

Kaled.

Thanks to both of you. As this machine is only used to test our own sites, no email, banking or anything else, I'm going to go as minimal as possible.

I should also have mentioned that my advice only applies if the computer is isolated, i.e. not connected to a network. However, since all your other computers are Macs, this doesn't apply.

Kaled.