I believe this is the right article that you are looking for. You must be annoyed by the popping up FBI warning message on your computer:
Your PC is blocked due to at least one of the reasons specified below.
( Here, YooSecurity can definitely tell you that your computer has been infected by virus/malware.)
You have been violation Copyright and Related Rights Law (Video, Music, Software) and illegally using or distributing copyrighted content, thus infringing Article I, Section 8, Clause 8, also known as the Copyright of the Criminal Code of United States of America.
( Just only a part of the message content ) What you need to do immediately is to think about how to remove the virus http://guides.yoosecurity.com/how-remove-fbi-moneypak-virus-malware-that-blocked-pc-asks-for-payment-100-dollars.
I can image that you are now very nervous and have no idea about what is going on? Why did you receive such warning message which is from Federal Bureau of Investigation? Can you believe you did violate the Copyright and Related Rights Law although you did nothing with your computer? You violated nothing and never would be arrested by the so call FBL Bureau because the warning message is absolutely fake. It is highly recommend you do not pay the money to anyone. Do not trust the content on the letter and close it directly. 
FBI Moneypak virus is generated by some hackers who want to cheat the money from the computer users. If you send the money to them, you will never get them back including your computer. You still can not unlock the computer because they are malicious. Although the FBI did not actually provide any information about the attack, by the looks of things, hackers had managed to hack the network using maliciously encoded file attachments. The reason why they had actually blocked users from sending and receiving attachments in the unclassified network was to give their technicians sufficient time to scan the network and identify and eradicate all threats.
Most of the antivirus programs are not very effective to remove the FBI Moneypak virus. You can try any one of the famous security software to delete the FBI virus. Actually, this kind of virus can be removed manually. Yes, it is true. Most infected computer users will find it difficult to remove FBI Moneypak even if they realize the scam because of the seemingly irreversible system’s lock-down. Despite this, there are a few tricks that could be used to regain access and delete the vicious infection. Some users will be able to remove the Trojan using system restore function after rebooting their PCs into Safe Mode with Command Prompt, whilst others could try the Safe Mode with networking feature. Let’s see how to remove FBI Moneypak virus manually step by step:
1. Restart your computer, press F8 while it is restarting. This may help you enter the safe mode.
2. You will see some options for the model of Windows. Please choose the Safe Mode.
3. Launch MSConfig
4. Disable startup items rundll32 turning on any application from Application Data;
5. Reboot your computer.
If you cannot use Safe Mode, try rebooting into safe mode with command prompt. Here how to delete FBI Monepak Virus using this approach:
1 Reboot into safe mode with command prompt. FBI Moneypak Virus should not be launched this time.
2 Run regedit. Search for Winlogon.
3 There will be a key labeled Shell under Winlogon. It should refer to Explorer.exe or be blank. If there is something else referring an executable in one of users folders, replace it with explorer.exe.
4 Save changes, reboot to safe mode with networking.
5 Run msconfig and disable all unnecessary startup entries. You should be able to reboot normally.
After the rebooting, please go to the normal model of the Windows system. And then use the searching function to find out all the files of FBI Monepak Virus. Delete them directly and restart your computer one more time. Now, the FBI Moneypak virus should be removed from your computer completely and successfully. Next time, if you encounter the warning message like the FBI Moneypak virus asking you send them money, just remember that do not pay the money to them. This is the first step to rescue your losses. You should know that any legal security department from the nation will not require you send the money with only simple letters. They will go to visit you or call you to the office and explain everything and the related policy/laws you may have violated.