Clients with a broken Configuration Manager Client is the worst. You lose management of the client, and it drags down compliance. I have even seen some broken clients report back as compliant while they are not. I’m aware about other community solutions to reinstall the client if broken, and they are all great solutions but I one of my customers had two specific issues with their clients that caused about 10% of the computers to not receive patches, and none of those solutions would fix their problem. I needed a way to consistently check the health sccm client and automatically attempt to fix known errors. ConfigMgr Client Health was born.
One of my customers had a lot of computers that didn’t receive patches because of an old group policy setting cached on the client pointing to a decommissioned WSUS server. Specifying a WSUS server in GPO is not necessary when patching clients with software updates in SCCM. Removing this group policy fixed the issue on a lot of computers, but we still had too many computers that where not compliant. GPO cache on the clients was the issue. and this is how we fixed it.