How to remove 'ScreenLocker' virus

Have you ever had this experience? Your computer screen becomes blank or locked, even into safe mode to boot the system is still the case. This malware is antivirus software 'AVAST' detects a virus called: Win32: ScreenLocker-H [Trj]. So how can we delete this virus? After removing the virus Why desktop or blank or can not be displayed, Registry Editor and Task Manager has been disabled, how to enable it?
Note: delete this virus need to use win-PE system.
Follow all steps to remove 'ScreenLocker' and clean up your computer.

Learn more about how to remove computer virus at: http://www.removalvideos.com/