Hi yourself,
Here's the thing: you know how to install and then, if you want to, remove software from your windows machine?
If the answer is 'Yes' then you can try Ubuntu then delete it if you do not like it.
http://wubi-installer.org/
You need 5Gb on your hard drive.
When it is installed open firefox and come to this answer or write this down but you can't afford a spelling mistake.
Go to System, Administration, Synaptic
type in the search box
ubuntu-restricted-extras
don't forget the apply button - you now have codecs and flash player etc - the rest you can work out with google or email me about the software you want.
Regarding the download speeds: not true
There is a torrent client installed but I have 3 and one of them is utorrent (you can't get utorrent for Linux so I have to use 'WINE')
While you are installing ubuntu-restricted-extras, search for and install miro (it can act as a torrent client but check it out because I don't think there is anything like it in Windows). It is like Boxee but reliable.