All day it's been going off, and when I go to a website it asks me to log into the router at domain.com/sky_router_status.html or something like that, and MSN keeps disconnecting or saying "message cannot be delivered" to everyone. I rebooted my router and it's still doing it... no problems with speed when it works though. And ping to bbc.co.uk is 30ms (better than usual!).

Thanks