PUM.Optional.DisplayHiddenFolder is Malwarebytes' detection name for potentially unwanted modifications (PUMs)in the Windows registry where users are prevented from finding hidden files and folders.
The following registry value data are modified:UnderHKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL
From:CheckedValue=1
To:CheckedValue=0
orCheckedValue=2
UnderHKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL
From:CheckedValue=1
To:CheckedValue=0
orCheckedValue=2
Malwarebytes can modify these registry value data back to its Windows default setting without user interaction.Also, we advise users to do a full system scan as PUM.Optional.DisplayHiddenFolder could have been added to the system by malwareor PUP.
When a Potentially Unwanted Modification (PUM)is detected on your computer, Malwarebytes for Windowsdoes 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 Windowsignore a PUM, you must add the PUM to the Allow list. Here’s how to do it.
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