Easiest way to lock your computer would be to set your PC to go to the lock screen when the screen saver comes on. To do this do the following assuming the Laptop is on Windows 10: Personalization-->Lock Screen -->Screen Saver Settings and then select On resume, display logon screen then set the timer for idle time. This will then prompt anyone to go to the logon screen to be able to use the PC. To track the device if you have Windows 10 do the following: Settings --> Update & Security --> Find my Device --> Click on the Change button --> The save my device's location periodically should now be set to ON. To find the device: When you need to find your Windows 10 device, open a web browser on any computer and log in to account.microsoft.com/devices. Sign in with the same Microsoft account that you are using on the Windows 10 device that you want to find. Then, locate your Windows 10 device in the list of devices that are registered with your Microsoft account. Click the "Find my device" link for your Windows 10 device.