The virus(s) that you are talking about are the blaster and welchia virus's which use port 135. this traffic is now blocked by ntl, so you are at no risk of contracting them.
To register, connect the ethernet cable, then browse to
https://80.5.178.26
Follow the instructions. Unplug the modem for a good minute then reconnect it, reboot the computer and your friend should be online.
I cannot emphasise this enough:
The first thing he should do is windows update, then make sure that he has an upto date anti-virus package, a firewall, and a spyware prevention tool.
If you need links for any of these things post back and i will happily provide them.
MB