If your desktop, laptop, tablet, or Surface is lost or stolen, use the Find my device feature to locate and lock it remotely.
To find your device:
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Go to account.microsoft.com/devices. If you're prompted to sign in, use the same Microsoft account you used to sign in to the lost device.
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Select the Find my device tab, and then select your device from the list on the left.
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You'll see a map with a highlighted location. Select the Find button to ensure this map is updated with the device's most recent known location.
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In the meantime, a new search will start. Wait a bit and your device's location should be updated.
When you find your device on the map:
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Select Lock > Next.
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Enter a lock-screen message for anyone who finds your device to see.
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Select Lock.
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Once your device is locked, you should reset your password for added security. Select Reset password and follow the instructions.
Get more info about finding and locking a lost Windows device
