Hey! Please, please, help me! This mornind I turnd my PC on and I saw some FBI message. I was told that I have to pay some fee ($100 I think) to unlock my PC.

There is no way, I thought, to have FBI on my PC. So, the answer was clear - this was some computer infection and it has attacked my system. But the solution is not clear at all. I have no idea what I have to do to remove this threat and here I really need you help.

If you know, please, let me know how I can get rid of this strange attacker and what is it in fact? Thanks !!!