<human>: Happened just now, I was listening to Nirvana's All Apologies on Youtube when a screen popped up on my laptop saying that it was locked by the FBI until I payed a fine of $300. The reason why I had to pay the fine was child pornography. First of all, I have never done anything even remotely related to filming/producing child pornography on or off the computer. Second of all, if I did partake in that I'm pretty sure the punishment wouldn't just be a $300 fine. 
The screen locking me out would only come up when I was logged in and sometimes I could open up the internet or another program before it did. The virus detecting software on my computer detected the virus and asked if I would allow it to run, or terminate it. All I had to do was click terminate and restart the computer, and it was gone.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Some idiots took over my laptop and tried to pose as the FBI, fining me $300 for child pornography I didn't partake in. The amateurs couldn't even get past basic virus detecting software.