Here are my notes for installing SCCM 2012: I have already been using SCCM 2007 for a couple of years now. It has been working fine. Now SCCM 2012 has come out so we have to upgrade. Note that my domain controllers are still Windows 2003 R2 SP2. I am following this very useful website which describes how to do an SCCM 2012 install. My running commentary as I go through the steps described in the web-page above.