Windows Installer 4.5 Required

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at]  

Topic Last Modified: 2009-07-20

Microsoft Exchange Server 2007 Setup cannot continue because Microsoft Windows Installer 4.5 is not installed on this server. Exchange Server 2007 Service Pack 2 (SP2) Setup requires that Windows Installer 4.5 be installed.

To resolve this issue, download and install the Windows Installer 4.5 Redistributable package, and then run the Exchange 2007 SP2 Setup program.

To download Windows Installer 4.5, see Windows Installer 4.5 Redistributable.

For More Information

For more information about prerequisites for the installation of Exchange, see Exchange 2007 System Requirements.