I've got Sky broadband at home using their latest model Sky branded SR101 router. For ages now I've been able to transfer files from my laptop to my PC using Homegroup at speeds of around 8MB/sec, however the last couple of days this has dropped to around 200KB/sec. I've rebooted the router, removed and readded my laptop to the Homegroup and tried shouting at it, but no joy. The only thing that's changed recently in the setup is the addition of a Sky wireless range extender which they very kindly sent me for free. Could this be source of the problems?