Recently a PC belonging to my friend became infected with a virus posing as the Department of Justice asking for a $300 payment to unblock the computer. I have researched this virus and tried restarting the computer in the various safe modes, this has not worked. Every time I try to start the PC in a safe mode, the desktop flashes up for less than a second and then the PC restarts instantly.
I need help in removing this virus asap. I am very grateful for anyone who can offer any potential help.