This was quite bothersome virus which froze the screen with its own screen purporting to be from FBI warning you of some dire consequences, unless you send $100 to them on recieving which they will unclock your computer.
I got this on my Laptop which was dual boot Win7/Win8. I could access Win8 but not WIn7. Win7 got infected.
The first thing I tried was to restore it to an earlier point. I chose a point some 3 days earlier to the day I encountered this frozen screen. It did not do any good. It came right back.
I searched the web here and there. At least I knew it was a scam. I did read someone got so scared he was contemplating committing suicide, may be he was doing something illegal and felt that he may be caught.
Then I got hold of Norton 360 6.0 and scanned the whole system on the Win7 side. It had no clue. It found some 7 non-consequential cookies which it removed. I called up Norton and chatted for a while. Well, they told me that Norton 360 6.0 should do the job but they would provide a technicain with whose help I could remove the bug. The cost was $99.99 for this service. I was not prepared to part with the money and I wanted to try other options. I also downloaded few others, but I was not quite sure they would do the job.
These are some related sites where you may find some help:
http://www.spywareremove.com/removefbigreendotmoneypakvirus.html
http://www.zimbio.com/Remove+Malware/articles/9kb7G7Lpj5K/Uninstall+FBI+Green+Dot+Moneypak+Virus+Effective
http://community.norton.com/t5/Norton-360/MoneyPak-FBI-virus-Green-Dot/td-p/808830
My advice,
forget about Norton,
don't pay them $99.99 not even $9.99, send me a $1 for my advice.
If anyone is interested I can provide the transcript of the chat.
Here is my fix:
I went back and restored the computer to a date in August 2012. It's gone and I am rid of that ransomeware. MSFT has a good thing in its SYSTEM Restore.
BTW, when you choose to restore choose the OS that is infected, in case you have multi-os on your computer.
