conmgr.exe is an ISP installation file. Sometimes used by ISPs to setup your Internet Connection, e.g. Earthlink. "This program is a non-essential system process, but should not be terminated unless suspected to be causing problems. "
Non-system processes like conmgr.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you
check your registry to identify slowdown issues.