I Recently purchased a new computer which is running windows 7,
at the same time i upgraded my previous laptop to windows 7 as well.
on the same network the upgraded laptop works correctly, however the new computer I purchased has random web pages that are unaccessable. Ive reset and updated everything possible and cannot find a solution. I also have this problem wether I run Internet Exlorer, Google Chrome or Safari.

New computer... new installation... something not right... it may be simple, it may be one of a number of problems that you are only just finding. Frankly, if a new installation does not feel right, reinstall. Why confront more problems further down the track?
Hand it back to the shop.
Maybe they put a net nanny on it....? My saying that sorta impugns your reputation, doesn't it? :)