DNSChanger Check

Check to see if your computer is a victim of "DNS Changer" by visiting one of the following sites:

URL	Language
http://www.dns-ok.us/	English
http://www.dns-ok.de/	German
http://www.dns-ok.fi/	Finish
http://www.dns-ok.ax/	Swedish
http://www.dns-ok.fr/	French
http://www.dns-ok.ca/	English/French
http://www.dns-ok.lu/	English
http://dns-ok.nl/	Dutch/English

Source: https://forms.fbi.gov/check-to-see-if-your-computer-is-using-rogue-DNS

More about DNSChanger on the FBI site:
http://www.fbi.gov/news/stories/2011/november/malware_110911

http://www.fbi.gov/news/stories/2011/november/malware_110911/DNS-changer-malware.pdf