Windows Can Lock Itself When You Walk Away: How Dynamic Lock Works

Walking away from an unlocked computer is an easy security mistake.

Windows includes a feature called Dynamic Lock that can help. It uses the Bluetooth connection with a paired phone as an indication that you have moved away from your computer.

When Windows determines the phone has moved outside Bluetooth range, Microsoft says the PC automatically locks within about a minute.

Set up Dynamic Lock

First, your phone needs to be paired with the Windows PC through Bluetooth.

Then open Settings > Accounts > Sign-in options and find Dynamic lock.

Enable the option that allows Windows to automatically lock the device when you are away.

Windows Security can also point you toward Dynamic Lock from its Account protection section.

What Dynamic Lock does not do

Dynamic Lock should be treated as a backup to a good locking habit, not a replacement for one.

If you are leaving a computer containing private information, the immediate option is still Windows key + L. That locks Windows without waiting for Bluetooth distance detection.

Dynamic Lock also depends on your phone being paired, Bluetooth operating correctly, and you actually taking the phone with you.

Leaving both phone and computer on the desk defeats the purpose.

Why it can be useful

The feature is especially handy on a laptop or shared-space computer where forgetting to lock the screen could expose email, browser sessions, documents, or other accounts to someone nearby.

It does not encrypt additional files, sign you out, or shut down the computer. It simply helps trigger Windows' normal lock screen.

Use it as an extra layer: configure a secure Windows sign-in method, lock the computer manually when you remember, and let Dynamic Lock cover some of the times you do not.

Sources and Further Reading

Microsoft Support: Sign-in options in Windows; Account Protection in Windows Security — https://support.microsoft.com/en-US/accounts-billing/security/sign-in-options-in-windows