First off let me state that I am new to SCCM but am in the process of learning. Today I was tasked with figuring out why a certain update, in this case KB2871997, reports the way it does when looking at either All Software Updates or the built in reports. We have the numbers for Installed, required, and not required. Some of the not required are legit and that is fine but there are also a good number of systems that fall under that category that do have the update installed. What causes that?