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Windows 8 ships with a limited selection of photos you can use as your lock screen background. Through the magic of app sharing, you can also choose photos from online albums on Facebook, Flickr, and SkyDrive.
The number of settings you can sync between Windows 8 PCs has expanded significantly since the Developer Preview. The only catch? You must use a Microsoft Account--a local account won't do.
From the Photos app, click Settings to connect web-based photo libraries and albums to a Windows 8 device.