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Reinstall of APPv 5.0 SP1 Server fails after Hotfix Installation / upgrade

Scenario:

We had errors with the App-V publishing service on one of our AppV 5 infrastructure servers. Hotfix KB2940354 had already been installed. But during the remove of the APp-V 5.0 SP1 client, the hotfixes are not removed, nor can they be uninstalled.

Error:

The Application Virtualization setup has failed because a more recent version of the App-V is already installed. To Complete the setup, uninstall the existing version of App-V.

Image

Delete this key:

Simply delete any keys related to any App-V hotfixes prior to reinstalling a lower version of the App-V server.
HKEY_LOCAL_MACHINESOFTWAREWow6432NodeMicrosoftWindowsCurrentVersionUninstall{e1ca9d65-0ebf-4fd5-98e5-00d6453967a4

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