Some websites are blocked and i do not know how to unblock these websites

This is the Cars and Trucks section of Fixya and you would be better off using a section on Fixya that more closely matches your product. Something like Games or Technical electronics.

In general there are Product Keys or Limited Licenses often on the wrapper or cardboard the game came with. Some games only give you a limited access for a basic price or a license which would expire after the 6 month or 1 year expires after the first time the game is activated. The time keeps on going whether you play or not.

Sometimes these games allow travel to other players and their Website. Like any Email a "Block Sender" setting by those players will block you from connecting permanently or until those players reset their Email. If a Security program has been added you can only gain entry if they add you as an approved site. If their parents changed settings or yours restricted your connections there will be no connection.