Sites we recommend...
These are sites with common goals or purpose, that we recommend you visit.
DNS Changer Checker (July 9th) : This will provide a basic check if your PC is using the wrong DNS because of a trojan. The real problem will be July 9th, when the substitute DNS servers are dropped.
More info on this http://mashable.com/2012/04/24/dns-changer-trojan/?hpt=hp_bn16