The next time you see an error shot back at you from a script or command console request and wonder what the number means, try using NET HELPMSG X (where X is the number)
For example: net helpmsg 1619 (one of my favorite msiexec errors)…
This installation package could not be opened. Verify that the package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows Installer package.
(by the way, the most common causes for this irritating error are either a bad path+filename request sent to the msiexec parameter inputs, or the file/folder permissions are blocking access)
No, this isn't a new feature. It's one of those things that's been around forever but everyone forgets about until it's rediscovered. So, just in case you forgot about it, here you go.