[P A U L]

Well it's a lot to explain in a single post...

http://en.wikipedia.org/wiki/Port_number

http://windows.microsoft.com/en-US/w...ndows-Firewall

If you are using a router you need to do the same on the router's website...

Usually on the router's website there will be something like:

Firewall >> Settings

& you'll have to find your computer on there & make a rule opening the port #. The port # needs to be assigned to utorrent & opened in windows firewall & also your router's firewall...