I encountered a similar problem one time. If I'm not mistaken the bittorrent software I installed, installed other programs with it. So after uninstalling it some garbage remained.
The garbage software can opening a lot of network connections.
You should check "Control Panel\Programs\Programs and Features" for unknown programs installed, and remove them. You can also open "the task manager" and search in the "Process" tab for process you do not know the origin. If you find any, try to search the web for the name, and if necessary delete it.
If all things fail, you can go to start/run , type "msconfig" without the cotes and in the "Startup" tab, remove again any process you do not know the origin, so that way the process won't start with windows. Here is an example of my msconfig.
Ah, and next time try µTorrent (microTorrent)