Since you can't open that link, I would check your HOSTS file.
And also, disable System Restore and boot up in
SAFE MODE (click link to read details), and do a complete virus scan, after you've made sure your virus definitions are up to date in your anti-virus program.
The HOSTS file can usually be found here:
Windows 95/98/Me => c:\windows\hosts
Windows NT/2000/XP Pro => c:\winnt\system32\drivers\etc\hosts
Windows XP Home => c:\windows\system32\drivers\etc\hosts
Windows Vista => c:\windows\system32\drivers\etc\hosts
(You need administrator access for Windows NT/2000/XP. For Vista you also need to turn off UAC or use an elevated access.)
Excellent information and details about the hosts file can be found
here and
here. You can also download a hosts file from the first site. But since there is a chance that you can't access it, I'll also attach the latest version to this post. Unzip it, and replace your hosts file with the hosts file within it.
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EDIT: HOSTS file removed again. If you want to download it, choose one from the two bold links above...
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