SCCM 2012 R2 Client Agent Uninstalling and Installing Itself Every 5 Hours

I’ve been using Tao’s ConfigMgr 2012 (R2) Client MP since he released it and recently we’ve noticed that a lot of alerts were logged for SMS Agent service not running and after half an hour or less being resolved automatically. Looking in SCOM for the closed looked like this:

What I’ve noticed that the alert was logged only for 3 servers and the alerts were repeating every 5 hours for every particular server.

Logging into the noisy alerts and looking in the SCCM agent logs I could see agent installing was causing this. So the obvious issue is that the SCCM client was re-installing itself every 5 hours roughly for these servers.

Over Internet I’ve stumbled on this forum post:

https://social.technet.microsoft.com/Forums/en-US/b10db3de-38c0-44b4-a4a2-11c9d5999083/client-is-uninstalling-itself-every-5-hours?forum=configmanagerdeployment

As of time of this writing there is no comment marked as answer but the guy who opened the thread last commented:

“I noticed in my ccmsetup.log that it was trying to install, and felt it needed to UNINSTALL before installing, so I have actually uninstalled (ccmsetup /uninstall) and then manually installed.  I am monitoring now to see if it has broken its cycle.”

So I’ve followed his guidance:

1. Uninstalled the SCCM client – C:\Windows\CCMSetup\ccmsetup.exe /uninstall

2. Installed the agent manually by copying the SCCM installation files to the server – Ccmsetup.exe /mp:<CentralSiteServerName>  /logon SMSSITECODE=<ABC>

3. Installed SCCM 2012 R2 CU2 as this is the latest version in my environment – Msiexec.exe /update configmgr2012ac-r2-kb2938441-x64.msp

After these steps seems the issue is fixed at least for now.

All credits to the guy (DragonSpeed) posting the thread.