PUM.Optional.NoChangingWallpaper is Malwarebytes’ detection name for potentially unwanted modifications (PUMs) in the Windows registry where users are restricted from changing their system’s wallpaper or its style.
The following registry value data are modified:
Malwarebytes can modify these registry value data back to their Windows default settings without user interaction.
Also, we advise users to do a full system scan as PUM.Optional.NoChangingWallpaper could have been added to the system by malware or PUP.
When a Potentially Unwanted Modification (PUM) is detected on your computer, Malwarebytes for Windows does not know whether it was authorized. Optimization software, malware, and Potentially Unwanted Programs (PUPs) are known to make these types of changes, hence they are regarded as potentially unwanted by design.
To have Malwarebytes for Windows ignore a PUM, you must add the PUM to the Allow list. Here’s how to do it.