An internal error occurred while changing the wallpaper in Win7.

An internal error occurred while changing the wallpaper in Win7.
An error occurred when changing the desktop wallpaper in Win7. The prompt is: you cannot set the image as a wallpaper, and an internal error occurs. How can we solve this problem?
 
1. Double-click the desktop "computer" icon and click "Organization"-"folder and search options" on the interface ".
 
2. switch to the "View" tab in the window, and deselect "Hide protected operating system files" in the "Advanced Settings" column, then, select "show hidden files, folders, and drives" and click "OK ".


 
3. then open the path C: \ Users \ User Name \ AppData \ Roaming \ Microsoft \ Windows \ Themes (the user name is the name of the user in use on your computer, and enter it on your own ), after opening the file, delete all the files in it.
 
4. After deletion, right-click the desktop and choose "personalized". In this case, you can change the wallpaper.
 
5. Then, we used the second method to hide all the files.