How to Lock and Unlock Function (Fn) key in Windows 11/10

@thephysicslabs on Instagram: "A key lock works using simple mechanics, precision, and alignment. 🔑 Inside a common pin-tumbler lock are two sets of pins: key pins (bottom) and driver pins (top), held down by tiny springs. When no key is inside, these pins block the cylinder (plug) from turning. When you insert the correct key, its unique cuts lift each key pin to an exact height. This lines up the gap between the key pins and driver pins with the shear line—the boundary between the plug and th