There is a lot of booting process when start the the Windows, some of which is the process have to be start. Then we are familiar with these processes and can open the "Task Manager", we may find there is no virus at a glance. And what process should exist, let's thorough understanding the role of these processes.
Session Manager Subsystem, the process for the session management subsystem to initialize the system variables, MS-DOS drive names like LPT1 and COM, call the Win32 shell systems and run on windows login process.This is a session management subsystem, responsible for starting the user session
Microsoft officials explained it:
If you use the xp system, this process can not afford to end off in the "Task Manager". If the process can be end it means this process can not cause direct harm to the system. However, you can use other software to force an end, but this will cause And the program uses the Ctrl + Alt + Del to open, the process as a single thread running on each processor, and the system is not processing other threads when distribute the processor time. In addition, The process can not be prohibited