The results of the last update to be applied can be accessed using the ReadLastUpdateInformation method of the Update Controller. This method returns the following information about the last update to be applied:
The time that the update completed execution
If the last update ended in an error condition, the text of the error can be read.
The path to the action list log file that was created by the update.
The final result of the update. Success, Failure, Cancellation.
The software version that initiated the update
The update version that was applied.