Hmm... well, looks like you do indeed have some UDP packetloss that occurs from time to time. Some tests show near zero, some show quite a bit. I'm afraid this is bad news. This indicates that most likely there is a faulty/super-congested router somewhere along the line. There is really only one thing you can do: bug the ISP. Try to get a technician on the phone, not just some customer service rep. Of course that's difficult with a big ISP... The ISP probably did not test UDP, since it is a rarely-used protocol. Most likely they just tested the raw data stream between your computer (or router) and the next immediate hop. This problem could come from any of those hops. Perhaps not even a hop under your ISPs control. But still, letting a technician know should speed up the fix, even if it is some router in the middle of nowhere. These things do get fixed when they're noticed but it's just that most people don't know how to notice this, so the tech support call centres aren't really equipped to handle these reports... You could try calling a tech over and explaining the issue to him (or showing him this thread) but I'm not sure whether he would be able to help you... at least over here the technicians don't know anything about internet, they just hook up wires to modems...