[Resolved with direct link install] - Error "The upgrade patch cannot be installed by the Windows installer service ..."

Unable to install update 3.5.2
Error message " The upgrade patch cannot be installed by the Windows installer service because the program to be upgraded may be missing, or the upgrade patch may update a different version"

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Hi.

This usually happens because, the user has a VPN, Firewall, Proxy, or antivirus preventing installation process

Please disable any antivirus software and try again.

Hope this helps

This may be the in-app installer getting blocked by a security setting.

Test using the direct link from here: Topaz Photo AI v3.5.2

If it reoccurs, you can bookmark this Releases Page to always have access to the latest direct links for every Photo AI versions: Releases - Topaz Community

Let me know how it goes!