Dynamic Lock was one of the newest features of the Windows 10 Creators Update which was released last April. Enabling this feature pairs with your phone and locks down your computer whenever you leave it unattended. So when your Bluetooth-enabled phone goes out of range, your PC automatically locks it down because of Dynamic Lock.
If you are working in a public area or if you have a nosey roommate, here’s how you can activate Dynamic Lock on your Windows 10 PC:
STEP 1: On your computer, click the Start Menu, then select Settings.
STEP 2: Click on Devices.
STEP 3: Under Bluetooth & other devices, toggle the switch to enable Bluetooth.
STEP 4: Click the + button next to Add Bluetooth or other device.
STEP 5: Under Add a device, click on Bluetooth.
STEP 6: On the next screen, click the appropriate device (your phone), then wait for your PC and mobile phone to pair up.
NOTE: Depending on the phone you will be pairing with, you may have to accept a prompt or two in order to complete the pairing process.
STEP 7: Now click the back button in the Settings menu, then go to Accounts.
STEP 8: Click on Sign-in options on the left panel.
STEP 9: Under Sign-in options, look for Dynamic lock, then check the box next to Allow Windows to detect when you’re away and automatically lock the device.