Sun Java Enterprise System 5 Update 1 Upgrade Guide for Microsoft Windows

Upgrade Application Server Dependencies

It is generally recommended that all Java ES components on a computer system (and in a computing environment) be upgraded to Release 5U1. Release 5U1 Application Server has hard upgrade dependencies on Message Queue and on the NSS shared component, so these should be upgraded before upgrading Application Server. Upgrading Application Server to Release 5U1 requires that Windows Installer patch (126910–02) is already applied.