Server Not Found

[Ziule]

Okay. Me and a friend of mine just got a router hooked up to connect our three computers to the internet. He has this lap top, and a computer running XP and I have a computer running Vista.

The issue is that his desktop and my desktop are refusing to run most websites, and is having issues loading some pictures up. Sites like myspace, google, yahoo and such run fine. Google does till you search for something then whenever I click on any of the sites it gives me a "Server not found" error. It does the same on his computer. The thing is it doesnt ALWAYS do it. Sometimes some of the google sites will actually work. Sometimes it lets him check his yahoo mail and sometimes it doesnt. Its very selective about the pictures it lets show up. Some videos on youtube will work, others wont.

Another thing is, this laptop (Which Im on now because my desktop wont let this site come up.) runs EVERYTHING fine. Like it and the other two should. This laptop and my desktop running Vista are connected with ethernet cords to the router and his desktop is connected wirelessly. Im really really lost but Im assuming it has something to do with networking or something or something thats turned on or off on our desktops or something.

I really just dont know, its just extremly annoying. Any ideas on how to fix this would be AMAZING. >.<

[Ziule]

Okay, I wake up this morning.
And now my world of warcraft wont start up either.
Neither will my aim.
Less websites work online.
My roomates stuff is working just the same.
Till I restart the router.
Now that wont work either.
***.