Windows can use devices that are paired with your PC to help detect when you’re away, and lock your PC shortly after your paired device is out of Bluetooth range. This makes it more difficult for someone to gain access to your device if you step away from your PC and forget to lock it. Follow these steps to set things up:
- Use Bluetooth to pair your phone with your PC. Learn how to pair devices using Bluetooth
On your Windows 10 PC, select the Start button > Settings > Accounts > Sign-in options.
- Under Dynamic lock, select the Allow Windows to automatically lock your device when you're away check box.
Take your phone with you when you move away from your PC, and it will automatically lock a minute or so after you're out of Bluetooth range. (Note that Bluetooth range varies by devices.)