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Posts tagged msi error 1638

MSI error code 1638: “Another version of this product is already installed”

When you try to remove an application, you receive the following error: “Another version of this product is already installed” with the error code 1638. This is a problem with minor/major versions of the installed product. When a GUID of a msi package changes (when an msi is generated for example), the product will detect itself […]

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