You can use the following built-in options to find the location of the current desktop background image file on a Windows 11/10 PC: Using the Classic Desktop Background window Using Registry Editor ...
Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\DesktopBackground\Shell\Troubleshooters] "Icon"="DiagCpl.dll,-1" "MUIVerb"="Troubleshooters" "Position ...