Windows 10 can be setup to auto-lock if a bluetooth phone goes out of range, and there's a little eco system of third party companies that make keyfobs that do

Windows 10 can be setup to auto-lock if a bluetooth phone goes out of range, and there's a little eco system of third party companies that make keyfobs that do the same basic thing. Even if it's not a common feature, it's not like I'd be surprised to learn these computers are imaged with some custom software, one of which could be a lock on command (or loss of connectivity to home). I have no idea how important these machines were, of course.