The Rollback phase of the installation is beginning.

Following this and this I realize that one must run the command prompt to in turn run a service installer as administrator or one will get an error like this:

The Rollback phase of the installation is beginning. See the contents of the log file for the C:\LocaleOfPublishedFiles\setup.exe assembly's progress. File is located at C:\LocaleOfPublishedFiles\setup.exe.InstallLog. Rolling back assembly 'C:\LocaleOfPublishedFiles\setup.exe'. Affected parameters are: logtoconsole = logfile = C:\LocaleOfPublishedFiles\setup.exe.InstallLog assemblypath = C:\LocaleOfPublishedFiles\setup.exe Restoring event log to previous state for source Whatever. An exception occurred during the Rollback phase of the System.Diagnostics.EventLogInstaller installer. System.Security.SecurityException: The source was not found, but some or all event logs could not be searched. Inaccessible logs: Security. An exception occurred during the Rollback phase of the installation. This exception will be ignored and the rollback will continue. However, the machine might not fully revert to its initial state after the rollback is complete. The Rollback phase completed successfully. The transacted install has completed. The installation failed, and the rollback has been performed.