Why does the internet disconnect when I am away from my PC for 30 mins+ and it never use to?

Question

I have a Belkin dongle and the router is a BT Home Hub. I used to be able to have the internet going all day long. For the past week when I am away from my PC for more than half an hour, it gets disconnected and I have to restart the PC again. Does anyone know why this is? The dongle and PC are about 15 months old and operates on Vista. If I need to download any updates, could someone please give me the link? I live in the UK. There are two other PCs that are on the same hub and don't have problems. I cannot change the hub as my dad's work pays for the internet.

Answer 1

check on the routers admin console to see if it is set to disconnect after 30 mins, might be worth checking power saving on your computer as well.

Answer 2

A wireless dongle doesnt have the signal strength that a pci card has for starts. I would guess that its poor signal strength to the router. Someone moved the router or PC?