SMS: Systems Management Server 1.2 Service Pack 3 Cannot Be Distributed Using Package Command Manager as a Service

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To use PCM as a service, you must use the Package setup to set the package to run as Automated Command Line and System Background Task. For this to function, the program must NOT require user input of any kind. The setup program employed by Systems Management Server to apply service pack upgrades does not support the use of silent or unattended installations. Therefore, it is not possible to update a primary site to Systems Management Server 1.2 Service Pack 3 by means of the PCM service. You must use PCM as an application, and it will require user interaction to install successfully.