At work, yes, always, because it's company policy and I can be officially reprimanded for leaving the computer unlocked and people actively look for this violat

At work, yes, always, because it's company policy and I can be officially reprimanded for leaving the computer unlocked and people actively look for this violation. At home, never, ever. This person was working from home. Though, I admit, if I'm working late and I'm the only one left in the building then I don't lock the computer. I'd imagine many computer uses don't know how to lock their computers if they weren't taught by IT - many "obvious" things to a tech savvy person are unknown by your average office worker (you can't imagine how many people I've taught to use CTRL+F) Also, the shortcut is Windows Key+L.