From what I can tell, Omaha enables msiexec log file output - for example to the following temporary path:

"C:\Program Files (x86)\Google\GoogleUpdate\Install\{B5F9BEF5-1D04-4FF5-AD92-4D1E21D76F51}\xyz.msi.log"

However, the containing folder is then deleted along with the log file during cleanup, AFAIK.

Is there a switch I'm missing to have this log file preserved. That's what I would like in order to diagnose problematic installs.

If not, what is the point in generating the msi log file which does tend to slow thing down?

Thanks a lot.