Meaning of CSRSS in English
Windows NT4//2000/XP only. CSRSS is the Client Server Runtime SubSystem. CSRSS is started by SMSS. When the user application makes a Win32 API call, it is usually CSRSS which communicates with the operating systems Kernel to execute the API call. CSRSS is also known as the Win32 Subsystem.
An integral part of the operating system, leave alone.
Microsoft Windows task list Programs English glossary. Английский словарь - Список целевых программ Microsoft Windows. 2012