When computer is what?
When computer is what?
When computer is what?
Just lock the screen. The worst that'll happen is a failed login or switching the keyboard layout or something.
Windows-L is the hotkey (in Windows at least), for those who maybe didn't know.
And in GNOME. In KDE, it's Ctrl+Alt+L. In macOS, it's Cmd+Ctrl+Q.
My KDE (both 5 and 6, just checked) also uses Meta+L, by default. On my KDE 5 Ctrl+Alt+L appears as custom but I don't remember adding it, maybe they inverted the two.
Maybe it's the other way around then, it's muscle memory at this point. I know GNOME and KDE are opposites.