We can launch auto updates window from command line using the command ‘wuaucpl.cpl‘. This can be used from Run command too.
This will launch Auto update window where you can configure whether updates should be automatically installed or not.
Note that this command works only on XP and Server 2003. This is not supported in Vista and Windows 7. Please see the below comments for more information.
We can also enable or disable windows updates from command line using registry keys.