Windows Services – Credentials

Network Service	Local Service	Local System
Predefined local account
Not recognized by the security subsystem
Not supported for LookupAccountName function
No Password associated with this account
Minimum privileges on the local computer	Extensive privileges on the local computer
Acts as the computer on the network	Presents anonymous credentials on the network	Acts as the computer on the network
		Its token includes the NT AUTHORITY\SYSTEM and BUILTIN\Administrators SIDs;
		.\LocalSystem LocalSystem ComputerName\LocalSystem
Security subsystem localizes this account name
NT AUTHORITY\NetworkService	NT AUTHORITY\LocalService	user SID is created from the SECURITY_LOCAL_SYSTEM_RID not associated with any logged-on user account
MSDN	MSDN	MSDN

SCM – Service Control Manager