When we use MCM (Microsoft Configuration Manager) App Model and we track the registry key example is for Photoshop.
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\PHSP_25_9_1
When we upgrade to the next version MCM thinks it is no longer there because it changed to PHSP_25_9_2.
It would be better to just used the SAP plus major version code without the minor version example:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\PHSP_25
That way it will know the product is installed and if we need to check the version we can pull that form the version key in that same location.
With out the change MCM will think the product is missing and reinstall thus dowongrading the updated version.
We support over 1200 CC users; it is easier to use MCM to deploy software. And by using the App Model if a user’s computer is updated or reimaged it will automatically put the product back if missing. MCM when using App Model will check the registry key to see what is installed.
Good example is CC Desktop App, it uses the same registry key for all versions and just changes the registry key for the version when updated.
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Creative Cloud
I can check for the executable, but registry key is the preferred way to check.
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