I'm using two systems with different operating systems. Both are on the same network. On one system, I update to the latest build (currently 18959 using XP) to test remote connectivity. On the other, I retain previous builds (currently 18825 using W7) for connectivity comparison. On the 18959 system, download rates peak within minutes of startup and then level out to a consistent 9 kb/s. On the 18825 system, the identical torrent provides and retains a peak download rate. 18959 also seems to hang around after exit. The process resides and must be ctrl-alt-deleted. Ports are properly configured, throttling tests were negative. Malware scans also negative. I'll continue with different configurations until I can get 18959 to perform properly.