It is not a scam, it’s very real and a huge threat. Here is some helpful information on this for you. Microsoft update 958644 is a must to install immediately if it is not already on your computer.
Check out my blog The Conficker Analysis – are you ready for April 1?
If a user is unable to reach either of these websites, a Conficker infection may be indicated (the most current variant of Conficker interferes with queries for these sites, preventing a user from visiting them). If a Conficker infection is suspected, the user should run the Microsoft Windows Malicious Software Removal Tool and install updates available from the Microsoft Update site.