Test Windows 11 Dynamic lock without trusting it as the only lock

Dynamic lock uses a paired phone's Bluetooth signal to lock Windows when the phone moves away. It is convenient, but Bluetooth range varies with walls and radios, and locking is not instantaneous. If you leave a laptop in a public place, manually press Windows+L before walking away. A genuine test checks whether the device actually locks when the phone leaves, whether it stays unlocked when the phone remains, and whether Bluetooth still pairs after restart.

Before you start​

Use a phone you control and a PC with Bluetooth. Keep a PIN or password sign-in method available. Note your organization policy and the device's normal screen-lock timeout. Never turn off the ordinary inactivity lock to make Dynamic lock appear useful.

Do it step by step​

1. Pair the phone in Settings > Bluetooth & devices and confirm the phone shows Connected or paired as expected. Remove an old phone pairing that you no longer control.
2. Open Settings > Accounts > Sign-in options > Dynamic lock and enable the option that lets Windows lock when you are away, if available on your build.
3. With harmless content open, carry the phone out of Bluetooth range and wait while another trusted person observes the PC. Record how long it takes to lock; do not run the test with confidential work visible.
4. Return and sign in normally. Repeat once after a reboot and once with the phone nearby so you can see whether false locks occur.
5. If it never locks, verify Bluetooth pairing, phone radio and policy. If it locks unpredictably, disable it and rely on manual lock plus a short automatic screen-lock interval.
6. Keep the Windows+L habit and verify the screen-lock timeout in ordinary power settings. Dynamic lock should be an additional layer, not the only protection when you stand up.

Check the result​

The PC locks reliably under the tested conditions, and the normal manual and timed lock routes remain active. Any inconsistent result is documented rather than assumed safe.

If something goes wrong​

Bluetooth RSSI can change in crowded radio environments even when the phone is nearby. If the phone is lost or unpaired, remove it as a trusted device and re-evaluate the setting. A disconnected phone may cause delayed or missed locks.

Know the limit​

Microsoft describes Dynamic lock as signal-strength based. It is not a proximity guarantee or immediate physical-security control. Use Windows+L before leaving the device unattended. Microsoft Dynamic lock Securing devices

Decision checkpoint​

Run the walk-away test at the actual desk, with the phone in the pocket or bag you normally carry. Bluetooth signal through a wall can vary by room. If the PC remains unlocked for longer than you would accept, use an immediate manual lock and a short inactivity timeout. Dynamic lock can be useful when you forget, but it should never be the policy you rely on to protect an unattended screen in public. Test again after changing phones.