Just got nailed logging in here with this virus, that calls itself "Vista Security 2011". It'll ask you to open it and even when you don't, it'll mimic your security and pretend to be an authentic anti-virus associated with your OS, but it isn't.
I think I got most of it off, currently running AVG and Malwarebytes to see what's up, and will report back.
So watch for it!
If you get hit, here are some suggestions.
*removed dodgy site*