You can lock your screen to protect your PC from unauthorized use when you walk away for a short time and do not want to sign out from your user session or turn off your computer. In Windows 10, there are several ways to lock your PC. One of them is the Lock command in the Start menu, under the user account picture. If you are the only user of your PC and have nobody to lock your PC from, you can remove this command since it will be of little use to you.
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