Ok let me chime in here for a few things. Here is the Wiki link to Bittorrent
BitTorrent (protocol) - Wikipedia, the free encyclopedia
Basically it is a way for large files to be transferred though single or multiple users. The programs themselves are very compact, easy to use and cover multiple operating systems. A vast majority of files are transferred this way.
Bittorrent is used by small companies like EA and Blizzard to transfer gaming files to users. It is the quickest and easiest way to transfer large files. It also saves companies millions on bandwith. Most of the time if you download a file online it is some type of torrent file. By the way windows update is a form of using Bittorrent.
A large majority of internet usage is the transfer of legal files using Bittorrent. They shut down a legal and legit tracker. A tracker is a website that index's torrent files. Most of the illegal content trackers are private and hosted in secret locations where the US government has little to no control. They basically are telling legit trackers you might as well host overseas and host illegal ****. By the way this type of hosting is cheaper and more secure than US hosting.
They are not solving the problem at all.
windows update is a direct download, it doesn't require the use of a third party client like utorrent or bitorrent. most software that you purchase on the internet, legally, can be directly download from the company's website, the same goes for freeware. wiki is not a credible source.