PID, the process ID, is a number used in some operating system kernels to identify processes uniquely.
Open “Task Manager” and open “Details” tab. See the PID of each Process.
Use tasklist command and you can get the list of currently running tasks.
Image Name PID Session Name Session# Mem Usage
============ ===== ============= ========= =========
System Idle 0 Services 0 8 K
System 4 Services 0 2,728 K
Registry 120 Services 0 36,960 K
You can see Windows service applications registered in your PC. Right-click “Start” and click “Computer Management.”
Open Services and you can see the list of Windows service application.
Windows service application contains updater, time setter and security software because these need to be executed automatically. And these applications should be executed without user login and user authority.
Status: Running or not
Srartup Type: Manual, Manual (Trigger Start), Automatic, Automatic (Trigger Start), Automatic (Delayed Start) and so on.
Features of Windows Service
It can be started automatically
It works in background
It works without user interface
It can work with any user
What is SCM?
SCM, Service Control Manager is a service for controlling services, which starts, stops, and monitors the status of services. SCM is started by the Winlogon process (winlogon.exe) when Windows starts and starts processes which have “Automatic” startup type.
SCM has “SCM database” that is a database of registered services. You can see the SCM database with Register Editor. Press Windows key + R and run “regedit”.
Then you can find the registry “Services” in your computer.