Same issues here. Starts at 8000, hits 68% on the first file then stops and the network speed drops to 14k. Task manager states no network activity after it locks up. I didn't have a problem before, but recently installed SP2 and Media Center. There is no firewall between my pc and xbox. I tried the c-xboxtool program as well, does the same thing. This has me thinking that it's a windows problem, not Quix.