Losing internet connection but not network connection

[sswats]

Intenret works then just randomly stops.
I can't browse using any of firefox, IE7 or chrome.
I can ping www.google.com, and utorrent continues to download.

If I restart windows it starts working again for a bit.

any ideas on how to diagnose.

 

[sswats]

i've been tinkering.
and its something utorrent is doing. I've had utorrent problems where it crashes my old router, but here i just start the program and my connection instantly drops. I can access internet from other PC's so its definitely doing something to my computer. But i can still ping websites.
But even connecting to my Netgear DG834GT becomes difficult.

The thing is i never changed any utorrent settings and have been using it for a while reliably for months. Never changed anything in fact and it just started acting up.