If your friend was able to access those exact same sites with the same exact connection on his comp , it's definitely your comp. But, this is very strange. Are you sure you are not connected on a wireless connection or behind a router , firewall? Are you sure you did not load any other programs after the clean install? And if you did what exactly did you install . You have to be clear on what you did, because there is no way you can not access those particular sites enless you already have a rogue virus or virus or blocked by that rogue program to prevent removal. Just for kicks check your cable box settings. 192.168.0.1 or whatever the default ip is for that box.