msssrv.exe is a process belonging to McAfee AntiSpyware and provides protection against adware, hijackers and other malware. This program is important for the stable and secure running of your computer and should not be terminated.
Non-system processes like msssrv.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