Tip for the day:
Trying to enable detailed logging to track down problems manually either through extra script commands or trying to pass through command-line parameters through all the layers was annoying, but there’s apparently a way to enable the logging permanently:
Go to the HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Installer registry key, and add a string value named “Logging” with the value “voicewarmup”. Log files will then always be generated, in the %TEMP% directory.