Hi @Andy Anderson,
A newer version of the Microsoft Web Deploy 3.6 was found on this machine.
Internet Information Services>Web Management Tools>IIS Management Service caused Web Deploy to appear in Programs and Features. You need to check it, after that, you can successfully uninstall and reinstall it.
Open Control Panel>Programs>Programs and Features, you can find the Microsoft Web Deploy 3.6.
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Best regards,
Yurong Dai