When trying to install EventSentry on a Windows 2000 (Win2k) machine with SP4, you get an error message and the installation will not proceed. The event log shows entries from the "MsiInstaller" source with an ID of 1015.

Article ID: 42
Category: Installation
Applies to: 2.50
Created: 2005-02-18

This error usually appears when your MSI installation is corrupt. Reinstalling the Microsoft Installer, or upgrading to the latest version should resolve this problem.