You'll have to talk with your parents to see if they want to lessen or
eliminate restriction on the contents of the web sites that you visit.
See http://support.microsoft.com/default.aspx?scid=kb;en-us;155609.
You'll probably have to show proof of your identify, your age, and proof
of purchase to show that you are the person that bought their operating
system and that you are of legal age over which content restrictions
should not be enforcable against you by your parents.
Of course, there is the other highly drastic action for formatting your
drive and reinstalling the operating system.
