Thanks for the advice, I really appreciate it but we're back to wired internet for the moment

To answer the questions we are using a Motorola cable modem.

I managed to get onto the Belkin router config page from my laptop, as per ScottC's advice but there didn't seem to be a configure wizard or some such and it asked for a password to do anything...which we didn't have. It appears my father-in-law did use the router a few years back but the usual passwords he told us on the phone didn't seem to work.

We poked around online and set the thing up like their instructions suggested. We put the network cable (from laptop to wireless router) into the back of the router but the corresponding LAN port light didn't show up and we weren't getting anywhere following the instructions. My wife called Belkin and they said to reset the router (using the method SoLittleMiles-SoLittleTime suggested) but then we never seemed to get connected again. The 'Connected' light would come on for a few seconds but would then go out, I tried to get the browser to work in the short time whilst it was on but with no luck. Belkin have said they'll get back to us and send a new router, they haven't got back to us yet.

I was almost waiting for the 'You're too stupid to own a computer' comment from the guy on the phone