Forgetting to lock your laptop before stepping away is an easy mistake to make, and Windows includes a built-in tool called Dynamic Lock to handle it for you. First, pair your phone with your PC over Bluetooth. Then enable Dynamic Lock under Settings > Accounts > Sign-in options. If you leave with your phone and the Bluetooth link drops, Windows can lock the PC by itself.
You should still lock your PC yourself, but Dynamic Lock catches the times you forget. It’s most useful if you work in a coffee shop or coworking space and slip out for a minute to answer a call.
How Dynamic Lock works
Dynamic Lock arrived in 2017 as part of Microsoft’s Windows 10 Creators Update. It treats a Bluetooth-paired phone as a proximity indicator, meaning Windows takes the phone’s presence as a sign that you’re nearby.
When the phone is within Bluetooth range, Windows assumes you’re close to the computer. Once you leave with the phone and the connection is lost, Windows can lock the PC automatically. It’s basically an automated version of hitting Windows + L each time you leave your desk.
There’s no app to install, no account to create and no complicated automation to configure. All of it lives in Windows Settings.
Pair your phone with your PC over Bluetooth
Dynamic Lock needs a device that’s already paired, so start here.
- Switch on Bluetooth on your phone.
- Pair the phone with your Windows PC over Bluetooth.
- Before continuing, make sure the phone shows as connected to your PC.
Turn on Dynamic Lock in Settings
With your phone connected, enabling the feature only takes a few clicks.
- Open Settings.
- Head to Accounts > Sign-in options.
- Scroll to the Dynamic lock section.
- Turn on Allow Windows to automatically lock your device when you’re away.
That’s it. Windows will now keep an eye on your paired phone and lock the PC once it concludes you’ve gone.
Know the delay before you rely on it
Your PC won’t lock the instant you move out of Bluetooth range. Windows waits until the Bluetooth signal falls below a certain threshold, and it also checks that the PC is idle before locking it.
In real-world use, the lock can take roughly 30 seconds to a full minute to kick in. That’s long enough for someone sitting close by to walk over to your laptop and start browsing through it.
Bluetooth connections can also behave differently depending on your location and the devices involved. For that reason, Dynamic Lock shouldn’t be treated as a guaranteed security system.
Keep locking your PC manually
Locking your PC yourself every time you walk away is still the safest habit. Hit Windows + L before you stand up, and the PC locks immediately.
Think of Dynamic Lock as a second layer for the moments when you get distracted, head off for a quick call or simply forget. It fills the gap between leaving your laptop unattended and realizing you should have locked it.
Frequently asked questions
How long does Dynamic Lock take to lock my PC?
Typically about 30 seconds to a full minute after you leave. Before locking, Windows needs to detect that the Bluetooth signal has dropped and that the PC is idle.
Do I need to install an app to use Dynamic Lock?
No. The feature is built into Windows. All you need is a Bluetooth-capable phone paired to your PC, after which you enable the feature in Settings.
Can Dynamic Lock replace locking my PC with Windows + L?
No. Because of the delay, someone could still get into your PC before it locks. Locking manually with Windows + L remains the safer habit, and Dynamic Lock is best used as a backup.
When was Dynamic Lock added to Windows?
Microsoft rolled it out with the Windows 10 Creators Update in 2017.











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