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Whenever I leave my computer for the bathroom or anything inside the living space, I press WinKey + L to enter the "Lock Screen" mode. (If I go outside, I turn it off completely.)

Let's say that somebody is in my house. I lock my PC in the manner just described and go to the bathroom. They immediately pick out a little USB device hidden in their pocket and stick it into a USB slot on my computer. It does "something evil", they unplug it and go back to looking innocent.

I come back, unlock it and continue working, but now I have some spyware on it.

Is this reality? Surely Windows must ignore anything inserted while in the Lock Screen mode? Please tell me it does. If not, and it actually runs stuff behind the scenes even then, I've just become even more paranoid.

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  • If it ignored anything inserted when locked then your keyboard and mouse wouldn't work until after you'd logged in, which would be problematic.
    – Gh0stFish
    Jun 8, 2022 at 15:05
  • @Gh0stFish I assume it would retain whatever was inserted before locking.
    – Derrol H.
    Jun 8, 2022 at 15:14
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    Useful read securitytidbits.wordpress.com/2016/02/05/…
    – user2320464
    Jun 8, 2022 at 23:15
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    @DerrolH. Yes, but it some people might want to plug in a USB keyboard before they have even signed in. So at minimum, it would have to install the (digitally signed) drivers for the device plugged in.
    – nobody
    Jun 9, 2022 at 5:25

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