Over our deployed upgrades we've had two sets of problems that fairly similar to each other, and reasonably common. (They occur at roughly 10% of our sites.)
Problem one is that the scheduled task to call the updater shows that the task has completed successfully. Looking at the installation directory the proper .aiu file has been downloaded, and the associated upgrader has been downloaded, but the upgrader program does not appear to have been run. (There are no logs within c:\users\USER_NAME\appdata\Local\temp), and our upgrader doesn't log anything, which it should do almost immediately.
Problem two is that the scheduled task shows an error 0x2EF3. Googling this error it appears to be a network connection error.
In both scenarios the next time the scheduled task is run automatically it frequently succeeds without any intervention on our part, and our running of the scheduled task manually has also always succeeded.
Do you have any insight into these problems? Are there any updater logs we can look at to determine what happened? Our upgrader program is fairly meaty at nearly 700mb, and many customers have poor internet. Does the updater have any time out timeout period?