I thought it was due to so-called "piracy"...
no as ian72 said, its a move microsoft made to save money.
In XP, vista and win7 the dvd codecs were preinstalled, but because of that microsoft had to pay for a licence for every cop of windows sold. Now they dont because the media pack isnt included by default.
BT Infinity 2 Since Dec 2012 - BQM