im expereincing a simliar problem, although i dont know the cause. just lately when i start torrents, they go like normal for about 4-5 mins then all of a sudden everything stops, the speeds gradually hit 0, and no internet applications work. actually they seem to want to work as they find the index.html on IE and stuff like that but its terribly slow and it never gets there or i havent waited for 5 mins to test it. Im using XP FW off, and McAffee Personal Firewall prog, on top of a router (dont have any firewall probs thou). No ZA software ever. anyways i found if i exit all torrents (using bittornado), my internet suddenly goes back to normal. like i said idk if this is from the xp hotfix or not. anyways i fixed the problem by switching clients
, but i hate other clients. BTW I sent a autobug report ive gotten that a few times also.