I'll assume a .NET setup is a Visual Studio Setup Project, but anyway there's something missing in your description. You may have to be more precise about what you did.
If you install an MSI file with a ProductCode, then that product guid is on the system, that's the definition of a product. If you now rebuild your MSI file with different content, and the ProductCode is the same (and you don't install it with a special command line) then it will go into maintenance mode when you try to install it. In Visual Studio setups that's a Repair/Remove choice. If you choose Repair then it does not use your new MSI file. It effectively says, oh, this ProductCode is already installed, and it uses the existing installed (cached) MSI file to do a repair. There'll be one entry still in Add/Remove Programs but there will be no new content from your new MSI file on the system. The other possibility could be that you (inadvertently?) used RemovePreviousVersions in your VS setup project, but that doesn't make sense if your ProductCode was the same in both your MSI files. That's the underlying issue - there is no such thing as an upgrade install when the ProductCode stays the same between two builds of an MSI file (unless you install the second one as a patch by reinstalling the entire new MSI file with a command line specifying REINSTALL and REINSTALLMODE). Them's the MSI rules no matter what tool you use to build your MSI file. So it comes down to exactly what you did and saw in your "upgrade". Phil Wilson -----Original Message----- From: Wix Mailing List [mailto:w...@danhinsley.com] Sent: Tuesday, May 18, 2010 12:04 PM To: 'General discussion for Windows Installer XML toolset.' Subject: Re: [WiX-users] Upgrade installation If you have two separate MSI files then you'll have two entries in Add/Remove Programs. There's no magic merge that makes them become one product. >> But I did the same type of thing using the .NET setup (which produces MSI files) and it did as I expected. The upgrade recognized that it was the same product as the initial install, and I only ended up with the one entry in Add/Remove Programs. Why exactly don't you want to include the file in subsequent updates? If it's a static file then patches and upgrades won't try to update it anyway if it hasn't changed. Otherwise don't use an MSI package to install it. Pack it in the Binary table of the first install, or as a resource in an exe so that Windows doesn't directly install and control it. You'll have to remove it at uninstall time. >> I don't want the user to have to download the larger MSI file (actually I turn it into an exe) that contains the static file when they do an upgrade, since there's no utility in doing so. I'm not sure what you mean by "Pack it in the Binary table of the first install". I'm not that knowledgeable about MSI's in general, have always used the .NET setup until I started using Wix. Phil Wilson -----Original Message----- From: Wix Mailing List [mailto:w...@danhinsley.com] Sent: Tuesday, May 18, 2010 9:41 AM To: 'General discussion for Windows Installer XML toolset.' Subject: [WiX-users] Upgrade installation The install of my app includes a large file that I don't want to include in the subsequent updates. So I have an install project and an upgrade project. I have the Product->UpgradeCode, and the Component->GUID Guids the same in the install and the upgrade. I use AutoGen for the Product and Package ID's. I run the install, then the update. Everything works OK, except there are now two entries in the Add/Remove program list. When I did this using the .NET install, it only kept the latest in the list. Any hints on how I would go about doing this? 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