It's not always possible to add the patch that is required (see below) with only connection for 60 seconds or so (even with broadband)

Follow these instructions to the letter, and you should be sorted: (Win XP I'm on BTW)

Go to Control Panel > Administrative Tools > Services, highlight the RPC service, right click, select properties, select the recovery tab, then change all three options to "Take No Action Service" as opposed to "Restart PC.
After you have the patch here do the above again and set it back to it's defaults.

Also, when you've finished this, I would advise you to add this patch: FixBlast


Tony