[H] Oh, how I miss the "KeyLock"

[Chris Reeves]

I have a few clients who are looking for something that years ago would have been simple.  They want to lock their PC so that their kids, etc. cannot use it without them getting the say so.  In the not-so-distant past, PCs had little “keylocks” on them, and when they were in the “lock” position, they wouldn’t take keyboard input, etc.   Now, I can’t find a board or a case that has those kind of functions.  So, I’m looking for something like a USB Dongle or anything that would accomplish this.   Anyone have recommendations?