What is process System:4?

Posted on 2007-10-02
Last Modified: 2012-06-21
I see a several lines in System Internals TCPView whose process name is "System:4".

System:4      TCP      Playroom:microsoft-ds      Playroom:0      LISTENING      
System:4      TCP      playroom:netbios-ssn      Playroom:0      LISTENING      
System:4      UDP      playroom:netbios-ns      *:*            
System:4      UDP      playroom:netbios-dgm      *:*            
System:4      UDP      Playroom:microsoft-ds      *:*            

Please advise what this is.
Question by:jwmarkert
    LVL 1

    Accepted Solution

    It looks like entries for Microsoft directory services.
    If your computers are on a network, especially Active Directory then this is normal.
    Otherwise it *may" indicated that your computer is infected with something.
    LVL 70

    Expert Comment

    System 4: is windows file and Print services - so this would appear to be normal

    Author Comment

    This is probably correct because I noticed activity when another pc was turned on and accessing a share on this system. Thanks.
    LVL 70

    Expert Comment

    Then it was File and Print services and I was correct  - Nothing to do with Directory Services
    Gee Thanks a bundle !!!

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