Happy Christmas

here's an at home problem.

At home I have a Netgear Router with 4 Pcs (and an occasional MAC) and an on demand video service connected via devolo dlan mains networking. My broadband connection speed is generally about 5 Mbps (checked at speedtest.net)

Something is causing my broadband to occasionally grind to a halt. If I restart the router it speeds up How can I monitor who is using the bandwith and whats being usedto see if its one of the connected machines.

I'd like to be able to this centrally to save running round the house banging in doors asking if I can come in.

Thanks

Nick