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Setting the RemovePreviousVersions property to true removes previous versions of the product from the system as you install the new version.

Set the RemovePreviousVersions property to true.Visual Studio displays a message box that prompts you to change the ProductCode and PackageCode. Increment the version property (see Figure 1).When you’re ready to build a new version of your product to replace an older one, follow these steps: Visual Studio supports the RemovePreviousVersions project property mechanism in its IDE. Since you have already installed the product identified by that Guid, you must use a Windows Installer update mechanism to install a new version of your product. The primary reason for this is that the ProductCode Guid identifies the product to Windows (see the setup project properties in Figure 1). Doing so, however, typically launches a message box indicating that another version of the product is already installed and directing you to the control panel to uninstall it. When you need to build a new version of your setup project or ship fixes to it, it’s tempting to rebuild the project and try to install the MSI file. This article explains how to install a new version of your setup project using the Windows Installer update mechanism.