Thanks for the suggestions. Didn't bother with a wireless connection as I assume that wired is more efficient. The router from TalkTalk didn't require any settings, just connect the phone line, power plug and ethernet cable, all the green lights appeared as they were supposed to do.
The router I purchased did require more in the way of settings but they were fairly straightforward.
I tried all the settings given to me over the phone such as msconfig, ipconfig, etc. and pinged TalkTalk which gave a result of 4 packets sent, 0 received.
I am now going to try uninstalling avg antivirus and Zone Alarm and see what happens!
After that it's Yellow Pages to look for a local computer techie!