I have a user's machine on wich the Windows Installer keeps flashing "Preparing to install...". There's nothing to install.
I've tried unregistering, re-registering, reinstalling, running the Windows Installer Cleanup Utility, changing the names of the Msi.dll, Msihnd.dll, and Msiexec.exe files, stopping the service, restarting the service, disabling the service, and downloading and installing version 4.5. Each time the problem returns after a few minutes. I'm at a loss as to what to do next. It's on a critical machine so any help would be greatly appreciated.