Following the instruction illustrated in this text, you are able to change lock screen picture on Windows 10 computer at a high speed.
Step 1: Open PC settings.
Step 2: Click PC and devices on the left, or tap the Lock screen photo on the right to go to change lock screen.
Step 3: Select a picture from the list provided, as shown in the following screen shot.
Tip: In this step, you can also tap the Browse button to choose a picture of your own according to the system prompts.
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