smss.exe is a process which is a part of the Microsoft Windows Operating System. It is called the Session Manager SubSystem and is responsible for handling sessions on your system. This program is important for the stable and secure running of your computer and should not be terminated.
Note: smss.exe is also a process which is registered as the Win32.Ladex.a Trojan, the PWSteal.Wowcraft.B Password stealer and the w23.sober.x mass mailing trojan. These Trojans allow attackers to access your computer, stealing passwords and personal data. It is a registered security risk and should be removed immediately.