Lock Fn Key Windows 11 _verified_ Jun 2026

On some devices, you must hold Fn + Esc for three seconds to activate the lock. 2. Windows Mobility Center

If you want to permanently change the default behavior so you never have to press the Fn key for standard F1–F12 functions, you can do so at the system level. lock fn key windows 11

If your keyboard doesn't have a dedicated lock key, or if you prefer a software setting, use the Windows Mobility Center. On some devices, you must hold Fn +

The Fn Lock is a small firmware feature with outsized impact on daily productivity. Windows 11 gives you multiple ways to control it—from hardware shortcuts to BIOS settings—but the best method depends on your OEM. On some devices