Hello again,

Just further to my last post, I worked through another troubleshooting site (perhaps foolishly I turned to the ISP's site last!) and my PC connectivity issue's resolved.

Should anyone else have a similar problem as mine I followed advice at the VirginMedia support site, where they advise (for Windows XP) entering a netsh command.

This has subsequently changed my IP address and all's well ... until I try the XBOX again :/