Win7 replacement wallpaper prompts internal error

Win7 replacement wallpaper prompts internal error resolution
An error occurred when replacing the desktop wallpaper in Win7 system. Tip: The picture cannot be set as wallpaper and an internal error occurs. How do we solve this problem?
1. First double-click the desktop “Computer” icon, and click “Organize”-“ Folder and Search Options” in the interface.
2. Then switch to the “View” tab in the window, remove the "protected operating system files" in the advanced settings column, check and then select “ show hidden files, folders And drive & rdquo; click & ldquo; OK & rdquo;.

3. Then open C:Users username AppDataRoamingMicrosoftWindowsThemes This path (where the username is the name of the user you are using on your computer, open your own input), delete all the files inside.
4. After deleting, right click on the desktop and select “Personalization”, and change a theme in it, then you can change the wallpaper.
5. Then use the second method to hide the files.