Are you intending this setup to be an update to an existing installation of your product, or a fresh install of the product?

>The Product Code and the Upgrade code are different. The version is different. There is no upgrade path.
>
>The user installs the setup to an existing folder. And the user files already existing in that folder are deleted.
>
>
>>>I thought I had forgotten to change them. But no.
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>>Just to be sure I understand: Are you saying the Product Code and Upgrade Code are the same in the new setup project as in the old project, or are they different?
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>>>When I install it removes all user files in the folder, files which were not installed by any windows installer package.
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>>Do you have any entries in the Upgrade Paths section of your InstallShield project?