Removal Guide for Ramsomware
In case your computer gets infected with the ubiquitous ransomware that pretends to be some form of action by the Department of Justice, Department of Homeland Security, or the FBI and that states child pornography was detected on your computer, then make sure that you have a copy of this removal guide at hand! The Your computer has been locked Ransomware is a computer infection that prevents you from accessing your Windows desktop, files, or applications until you pay a $300 ransom to the malware developers.
Get the full guide from here – http://www.bleepingcomputer.com/virus-removal/remove-your-computer-has-been-locked-ransomware