The SCOM 2012 R2 Agent (Microsoft Monitoring Agent) becomes greyed out on the Windows Server 2012 R2 based systems.
A lock in the OS code is hit when the PowerShell modules that ran a certain PS script are unloaded.
Please be careful with applying this update rollup in your production environment since these updates might introduce new unwanted issues. So TEST them first before rolling them out in your production environment. I take no responsibility for any issues at all.