It seem uTorrent 2.0 build 17539 cause 100% cpu usage on my Windows 2003 R2 Sp2 server. about 605 of the usage is utorrent itself and the other 40% comes from "System" but only when utorrent is running. Never mind on the above it was avast even though everything but standard shield was disabled. But this is still happening. I tried the 2.1 alpha but it just crashes out on startup, I did tell it to send the dumps.