Upgrading from VMM 2012 to VMM 2012 SP1
To upgrade to VMM 2012 SP1, you should already be running VMM 2012. VMM 2012 SP1 requires a Windows Server 2012 and Windows ADK 8.0. If planning an in-place upgrade, back up the VMM database, uninstall VMM 2012 and App Controller, retaining the database, perform an OS upgrade, and then install VMM 2012 SP1.
Since VMM 2012 SP1 and later VMM support SQL Server 2012, I recommend to upgrade SQL Server to this version in order to simplify migration to VMM 2016 from VMM 2012 SP1 and VMM 2012 R2.