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Editorial Team
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Asked: 2026-05-16T11:10:04+00:00

At work we use WiX for building installation packages. We want that installation of

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At work we use WiX for building installation packages. We want that installation of product X would result in uninstall of the previous version of that product on that machine.

I’ve read on several places on the Internet about a major upgrade but couldn’t get it to work.
Can anyone please specify the exact steps that I need to take to add uninstall previous version feature to WiX?

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1 Answer

  1. Editorial Team

    In the newest versions (from the 3.5.1315.0 beta), you can use the MajorUpgrade element instead of using your own.

    For example, we use this code to do automatic upgrades. It prevents downgrades, giving a localised error message, and also prevents upgrading an already existing identical version (i.e. only lower versions are upgraded):

    <MajorUpgrade
    AllowDowngrades="no" DowngradeErrorMessage="!(loc.NewerVersionInstalled)"
    AllowSameVersionUpgrades="no"
    />
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