When you try to install the Microsoft Exchange Best Practices Analyzer on a Windows Vista-based computer, you receive the following error message:

There is a problem with this Windows Installer package. A program required for this install to complete could not be run. Contact your support personnel or package vendor.

Additionally, an event that resembles the following is logged in the Application log:

Log Name: Application
Source: MsiInstaller
Event ID: 11721
Task Category: None
Level: Error
Keywords: Classic
Description:
Product: Microsoft Exchange Server Best Practices Analyzer Tool — Error 1721. There is a problem with this Windows Installer package. A program required for this install to complete could not be run. Contact your support personnel or package vendor. Action: CA_INSTALL_HBA, location: Drive:\Program Files\ExBPA\Support\hbains.exe, command: /install-schema-noeula-quiet