How to set up Dynamic Lock on Windows 11

Dynamic Lock is a Windows feature that locks your PC on its own when you walk away, using the Bluetooth signal from a phone you keep with you. When the phone leaves Bluetooth range, Windows locks the desktop within about a minute. Treat it as a backstop for the times you forget to lock the screen yourself, not a replacement for doing it by hand.

What Dynamic Lock actually does, and what it doesn’t#

Windows watches the Bluetooth connection to a phone you’ve paired. Walk far enough that the signal drops and it locks the machine, so no one can use your session while you’re gone. Per Microsoft’s Dynamic Lock guide, the lock happens within a minute of your going out of range, so think of it as a safety net rather than an instant response.

A few limits are worth knowing before you rely on it:

• It only locks. It does not sign you back in when you return; you still enter your PIN, password, or passkey to get to the desktop.
• The lag means someone at your desk has a short window before it triggers. For anything sensitive, lock it yourself.
• No paired Bluetooth phone means no feature. It needs a device to sense.

Because of that delay, keep pressing Windows + L when you stand up. Dynamic Lock is the layer that catches the times you forget.

Pair your phone over Bluetooth first#

Windows can’t sense a phone it hasn’t met, so pair one before the Dynamic Lock option will do anything.

1. On the PC, open Settings > Bluetooth & devices and make sure Bluetooth is On.
2. On the phone, turn Bluetooth on and make it discoverable, which usually means putting it in pairing mode.
3. Back on the PC, choose Add device > Bluetooth, pick the phone from the list, and confirm the matching code on both screens.

Microsoft’s pair a Bluetooth device page has the full walkthrough if a step looks different on your hardware. Once paired, the two reconnect on their own whenever they’re in range.

Turn on Dynamic Lock in Sign-in options#

With the phone paired, switch the feature on. The path is the same on Windows 11 and Windows 10:

1. Open Settings > Accounts > Sign-in options.
2. Scroll to Dynamic lock.
3. Check the box labeled “Allow Windows to automatically lock your device when you’re away.”

That’s the whole setup. Carry the paired phone with you, step out of range, and Windows locks the session automatically.

Why it’s slow or grayed out#

Two complaints come up often: the checkbox won’t turn on, or the lock feels sluggish. Here is the likely cause and the fix for each.

Symptom	Likely cause	What to do
Dynamic Lock box is grayed out	No phone is paired, or Bluetooth is off	Pair a phone over Bluetooth and turn Bluetooth on, then reopen Sign-in options
Nothing happens when you leave	It isn’t the paired phone, or you’re still in range	Keep the paired phone on you; Bluetooth reaches roughly 30 feet, so step well clear
Locks about a minute after you go	Expected behavior	This is normal timing; use Windows + L for an instant lock
Stopped working after an update	Bluetooth driver or the pairing dropped	Re-pair the phone under Settings > Bluetooth & devices

The greyed-out case is the common one, and it’s almost always the missing pair. Windows won’t let you enable a feature it has no device to watch.

Simpler ways to lock your PC#

Dynamic Lock is a convenience, not the main event. These always work, and none need a phone:

• Press Windows + L to lock instantly. It’s the fastest habit to build.
• Set a short screen timeout under Settings > System > Power & battery, then require sign-in on wake so an idle PC locks itself.
• In the lock screen settings, the classic screen saver with “On resume, display logon screen” checked does the same job on a timer.

Pair those habits with a stronger way back in: set up passkeys or a PIN so signing in is quick, and turn on two-factor authentication on the accounts that matter so a locked screen isn’t the only thing between a stranger and your data.

Think of Dynamic Lock as insurance for the moments you forget. It’s easy to switch on, it costs nothing, and it quietly covers the walk to the coffee machine. The lock you can count on, though, is still the one you trigger yourself with Windows + L.