OKay people.
Step 1 Uninstall Real 1 Player - A) Because it sucks and b) Because its way too pushy for my liking
Step 2 go
here and download Real Alternative and the codec pack. (Follow the instructions)
Step 3 sit back relax and be glad you got rid of real player.
BTW - if you go further down the page - you can download Real Alternative by itself. Just in case you miss that.