Just caught this the other night, while doing some Valeptr clicks. It's pretty nasty, it poses it self as the actual Windows Security Center telling you that you are loaded with virus and click here to purchase their software, in effect giving up your credit card info.
Alot of site's give a long registry edit pain fix. But I just booted into safe mode and ran Malwarebytes and voila!

http://www.malwarebytes.org/