For Windows users, it’s possible for you to find many useful free tools fromMiniTool Software, e.g.

MiniTool Power Data Recovery, MiniTool Partition Manager, etc.

Every image you used as the background is stored in computer.

how to delete wallpaper Windows 10

Tip: You should be careful to edit the registry.

Learn:backup and restore registry.

remove recently used desktop backgrounds in Windows 10