The FBI's temporary Internet servers will go dark Monday, leaving thousands of unsuspecting malware-infected individuals without online access. It started in 2007, when a group of hackers - six Estonians and one Russian - allegedly started masquerading as Internet advertisers who were paid by the click. They created a piece of malware, called DNS Changer, that tampered with the DNS, redirecting millions of Internet users to sites they didn't search for.
Once the FBI got around to fixing the problem in 2011, it realized it couldn't simply shut down the rogue servers because infected computers would be left without a functioning DNS, leaving them virtually Internet-less. So it set up temporary servers to give malware-infected Internet users time to fix their computers. And time runs out on Monday, July 9.
You can check to see whether your computer is infected by going to DNS Changer Check-Up which is run by DCWG. If you see a green background your computer is OK. Had your computer been infected with DNS changer malware you would have seen a red background.
(via abc News)