Once upon a time I was on a library computer when I got a popup sayng that I had been caught doing "one of the following": fraud, child pornography, hacking, etc. and my computer would be locked until I payed a $500 fine by PayPal. Sure enough, no keyboard, no mouse, no Ctrl+Alt+Delete, etc.
So I turned the computer off and on again and everything was fine. I even had my 2-hour time limit restored.
That was several years ago and I'm still at large. They don't seem to know as much about me as they know about you.
"I've been to Moose Jaw, now I can die." -- John Wing