You receive a "This application requires the Windows Installer to run" error message when you start an Office 2000 program

When you attempt to start an Office program, the following error message appears: NOTE: Microsoft Office 2000 has built-in functionality that allows you to get more information about difficult-to-troubleshoot alerts or error messages. If you want to enable this functionality for this and other error messages in Microsoft Office 2000, please download the Microsoft Office 2000 Customizable Alerts file from the Microsoft Office Update Web site at the following address: NOTE: If you reached this article by clicking the Web Info button in an error message, you already have Customizable Alerts enabled.

The Windows Installer is missing or damaged.

To manually install the Windows Installer, follow these steps:

1. Insert Microsoft Office 2000 CD 1 or CD 2 in the CD-ROM drive.
2. Click Start, point to Programs and click Windows Explorer. Browse to the Msi folder on the CD.
3. Double-click Instmsi.exe for Microsoft Windows 95 or later, or Instmsiw.exe for Windows NT version 4.0.

For additional information about manually installing Windows Installer, please click the article number below to view the article in the Microsoft Knowledge Base: