Cannot change desktop wallpaper
Before starting, please check if you have installed and third-party custom software and restrict you from changing your desktop wallpaper. If so, remove it and restart your Windows computer.
1] Open Control Panel and select ‘Ease of Access’ Center. Then, click on the link ‘Optimize Visual display’. Scroll down until you find the ‘Make the computer easier to see’ section. Once found, make sure Remove wallpaper (if available) is unchecked. Save, Apply, Exit.
2] Open Power Setting in Control Panel. Open Power Options> Select your power plan> Change plan settings> Change advanced power settings> Expand the Desktop background settings option> Expand Slide show.
Make sure that the Plugin option is set to Available.
3] If the above option fails, your TranscodedWallpaper.jpg file might be corrupted.
Open explorer and type the following code in the address bar and press Enter:
% USERPROFILE% AppData Roaming Microsoft Windows Themes
Here, rename TranscodedWallpaper.jpg to TranscodedWallpaper.old.
Next, double-click slideshow.ini and open it with Notepad. Empty its content. That is, select all the text and delete it. Save changes. Close the window.
4] If not, try this. Run regedit and navigate to the following key in Registry Editor :
HKEY_LOCAL_MACHINE Software Microsoft Windows CurrentVersion Policies
Right-click Policies> New> KEY> name it ActiveDesktop .
Next, on the right side, right click> New> DWORD> name it NoChangingWallPaper.
The DWORD value 1 will limit changes to the desktop background. Let it change the value to 0.
5] Or you can open the Group Policy Editor by typing gpedit.msc in the Run box and pressing Enter.
Navigate to User Configuration> Administrative Templates> Desktop . Click Desktop again. Double-click Desktop wallpaper.
Make sure the Not Configured option is selected. This will give the option to change the Desktop background.