Youtube not accessible..Plz help...?

a hub or a router? if its a hub, that means you are using Internet sharing on one computer, in which case you may need to look at your setting there. you may be blocking somthing from other comps on the network......... if tis a router, you need to look at the router settings its self. personally i would spend the money on a router, that way both computers can have direct access to the net without having to do a shared connection, and you can still network them together as well