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Here, you can find a few options to change the default behavior of the slideshow. To configure the slideshow, click the Advanced slideshow settings link. Click on the Add a folder icon and then select the folder containing your favorite pictures that you would like to use for the lock screen. Step 3: You will now see Choose albums for your slideshow section. Step 2: In the Background section, choose the Slideshow option from the drop-down box.
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Navigate to Personalization > Lock screen. Here is how to configure the Windows 10 to change the lock screen background periodically. Automatically rotate lock screen background picture in Windows 10
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