Installation of the msi based redistributable vcrt runtime libraries has always been logged. The only logical location for the output is to the temporary directory created by the InnoSetup installer. Unfortunately these logs are automatically deleted when the installer closes.

This fix adds the option to add /MSILOGDIR="/path/to/location" to scripted installs so that the logs can be preserved for future examination if required. It is hoped that this fix will help find a permanent solution to #8326.