LOL... if you're still getting this, may mean you're hacked and the hack is making you think that their page doesn't exist (happned to my dad's PC once with Google). For more information check the hosts file on your computer, its usually located here:
C:\WINNT\system32\drivers\etc\hosts
Unless you've installed your Windows somewhere else. Inside the file you will find domains and IPs, 1 per line. When a domain is in that file Windows doesn't check any DNS records and always uses the specified IP for the domain you're looking for. It's useful when you've changed your server's IP, but the DNS record haven't refreshed yet.
Hope it helps
