By visiting this site sit up by the FBI. It will tell you whether your computer is infected or not. But my understand (and remember this is what I have gathered from reading up on this), if you have a “good,” “good” anti-virus you should be safe. But if you are concerned as I was, you can visit the following site and it will tell you if you are infected.
July 9 could be ‘Internet doomsday’ for some (so check your PC or Mac)
July 9 might be “Internet doomsday” for PC and Mac users who haven’t taken steps to make sure their systems are not infected with what’s being called DNSChanger malware.
That’s right: Your Internet connection may not work that day because the safety net now in place from the FBI against the malware will be removed then, and if your computer is infected, you won’t be able to get to the Internet. Read More……