Yes' date=' this needs to be fixed ASAP, for me makes this client unusable. At least could we get an update on the problem?[/quote'] There is another solution instead of playing with diskio.use_partfile etc. Run Process Hacker, find uTorrent.exe in a list of processes, right click -> Properties, go to Threads tab, find a thread with the lowest priority and set both Priority and I/O Priority to Normal. Works perfectly, don't know why the developers did that... Well, these steps should be performed every time uTorrent is started, but since I restart uTorrent once a week at most, it's fine for me