It's impossible to work slowly with what you have. Very important component is motherboard, if the motherboard doesn't have high bus you will not have the desired speed. What I suspect at your environment is the software PC. To be more precisely, I think that you have to reinstall your windows, to be clean with not too many dll, I mean not too many programs installed.

Don't forget also to check you PC against viruses and about your utorrent it must be no problem as soon as the traffic (upload/download) is under 300KBps.

Pinnacle 11 is a real improve from the last release v10, which was a disaster.

good luck!