Multiple choice general knowledge Lock the System CTRL+SHIFT+SPACEBAR Windows Logo+SHIFT+D ALT+SPACEBAR Windows Logo+ L SHIFT+INSERT+SPACE Reveal answer Fill a bubble to check yourself D Correct answer Explanation Windows Logo+L (Win+L) is the standard shortcut to lock the Windows computer. This secures the entire system, requiring password or PIN re-entry to regain access. It protects both keyboard and screen input when stepping away from the computer.