Directory folders are not removed from the registry

[RLOatCybereason]

Hello Nir,
When I remove an MSI product using the following:
MsiZapEx.exe --upgrade-code {6031B2EA-BFFC-4CEB-8991-3D43BE82E0AF} --delete-all-related
the folder entries in the registry under Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\Folders are not deleted.
Those entries are deleted during uninstall.

Hint: the folders that are listed under the Folders registry key are all the Directory folders that actually have at least one CreateFolder in an included Component.

Thanks in advance and all the best.
RLO.

[nirbar]

A few thoughts:
These registry values are not component-specific. What happens if another component, perhaps in another msi, references the same folder?
In that case deleting it for one component might harm the other.
Actually, it isn't clear what these values mean, if at all they mean anything...

[RLOatCybereason]

Hi Nir,
As you can see in the image I've attached (or in the registry), some of the folders have 1 in the Data and most don't.
I would assume that the Data value is counter that means that if it's empty or zero it used by only one product and if it's >=1 the the clean action should subtract 1 and leave it in the registry and <1 then it should be removed.

Note: I would add that this is only my assumption yet to be proven.

All the best.

[RLOatCybereason]

Hi Nir,
I've created a test bundle with 3 MSI's.
From the test it seems that when an MSI is being uninstalled for each folder in the mentioned registry branch it checks if it's empty and if it is it'll be deleted.

TestSetup.zip