Check for DNS Changer infection
July 9th, It is Monday and you could turn on your personal or office computer and not be able to get online. If you did not know, thousands of computers, including Macs, have been infected with the DNS Changer virus. This virus changes the DNS servers used by a computer to match a website name to an IP address with rogue DNS servers controlled by bad guys. The FBI has taken the bad guys out, and have temporarily replaced the rogue DNS servers with clean ones. On July 9th, they will turn the clean DNS servers off leaving computer still infected unable to browse the net.
You can easily check if your computer is infected by going to the following webpage : http://www.dns-ok.us/ . There is no download required, and no scans of personal data. If your computer is infected and therefore uses the FBI DNS, those DNS will redirect your computer to the infected warning page.
Some Internet providers have also been doing DNS request redirection when they see that your computer is infected. It is possible that the webpage above shows that your computer is clean even though it is infected. I recommend scanning your computer with the Free Norton Power Eraser tool. This tool will detect if your computer is infected with DNS Changer or other malware.