Thanks for your perseverance. There are no errors showing in Device Manager event viewer, so I'll give that a miss.
The Gateway icon has disappeared and must have been to do with the new router. I now have :-
Local Area Connection - showing status enabled, connected, firewalled,
1394 connection - showing status disabled,
Internet Connection - showing disconnected,
Broadband Connection - showing disconnected, firewalled.
Could the last item be the wireless connection for my Vista laptop which is networked to my XP? If so, it still shows disconnected along with the Internet Connection even when the laptop is on. Does this look normal?
Unfortunately, I cannot perform any downloads for the Malware. They all freeze.
If all else fails, I'll try the reset, which according to Talktalk might become a bit involved.