DNS, Domain Name System, is an Internet service that converts user-friendly domain names, such as www.fbi.gov, into numerical addresses that allow computers to talk to each other.  Without DNS and the DNS servers operated by the Internet service providers, computer users would not be able to browse web sites, send e-mail, or connect to any Internet services.

Criminals have infected millions of computers around the world with malware called DNSChanger which allows them to control DNS servers.  As a result, the cyber thieves have forced unsuspecting users to fraudulent websites, interfered with their webb browsing, and made their computers vulnerabble to other kinds of malicious software.

Update on March 12, 2012: To assist victims affected by the DNSChanger malicious software, the FBI obtained a court order authorizing the Internet Systems Consortium (ISC) to deploy and maintain temporary clean DNS servers. This solution is temporary, providing additional time for victims to clean affected computers and restore their normal DNS settings. The clean DNS servers will be turned off on July 9, 2012, and computers still impacted by DNSChanger may lose Internet connectivity at that time.

Test your PC by clicking this link: http://www.dns-ok.us/