An elderly family friend called me. Her laptop (Windows 10 IIRC) is saying - literally as in a voice message (with an American accent) - that it has been locked by an administrator. She does not appear to be getting a Windows login screen. Thus far I have advised her to switch it off and get proper professional help from someone closer than 500 miles away. But I'd still like to help her as much as I can. So, is this a hack and are any of you familiar with it? She also mentioned a black window in the background with scrolling text, which sounds awfully like a crypto-locker virus doing its work.