Clean ConfigMgr client installation.
FromTechyGeeksHome:A lightweight application that was especially created in order to provide a simple means of repairing damaged Configuration Manager clients. ccmclean is a utility that is tailored for anyone who needs to repair a Configuration Manager client installation that is faulty or is missing some components. The program is able to completely uninstall the client and remove any trace it may otherwise remain behind if other methods are used. After running ccmclean all that's required is a reboot and then you can re-install the client manually or re-deploy it from the Configuration Manager server.