mssvc.exe is a process associated with the StealthDisk application used for hiding and encrypting files and folders. "This program is a non-essential system process, but should not be terminated unless suspected to be causing problems. "
This process may also be associated with the NEGASMS.A TROJAN!
Non-system processes like mssvc.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