Yet another one of those evil scam calls.
Thankfully my client didn’t hand over any quids or details, but the scammer locked the computer with a hidden password & encrypted all of his files, when he ended the call.
Very malicious!
It took a while to extract & de-crypt all those gigabytes, but thankfully everything important was recovered…Phew!
Full re-install of windows & scan of the recovered files, and we’re done.