Go to the Microsoft official web page, then log in to your account. 2. After that, you can see a list of devices; between them, find your device and tap on it; below that, you can see a "Find My Device" option; click on it. 3. Now, it will start tracking your device; when it shows the location on the map, select the "Lock" option and click the "Next" button. 4. After locking the device, you can reset your password.