We have an MSI that writes to HKLM\Software\Novell\Login\Banner. The problem is that for some unknown reason the packager set HKLM\Software\Novell to "Install if present, uninstall if absent". If performing a major upgrade or uninstall of the package uninstalls the HKLM\Software\Novell and breaks Novell. It's easy enough to fix new installs, but how can I fix the problem on existing installs? It needs to be a totally silent solution. I've try to repair the app and that doesn't work. The only way I've been remotely successful was deleting the cached MSI from C:\Windows\Installer and then repairing, but since that is a randoming generated filename that won't be a permenant solution.
The database you mention deleting has the Registry table logic that needs to be fixed and recached. One way to do this would be a meaningless Minor Upgrade and another would be to write a script to go update that database.
