NT kernel &System using port 80 unable to stop the process. RRS feed

  • Question

  • I just installed windows 10 and XAMPP on my new laptop. XAMPP is not working because another program is listening on Port 80. After further investigation, I found that System with PID 4 (described as NT kernel & system) is listening on that port. I have tried every ways I know to kill or stop the process  all to no avail. I get error message that access is denied when I tried taskkill from command line. I will appreciate any help I can get.


    Wednesday, August 5, 2015 6:56 PM

All replies

  • Hi feo11,

    sorry for the inconvenience. please follow these steps:

    1. run this command through cmd prompt in elevated mode.

    netstat -nab

    you will see the log. sample looks like this.

    C:\Windows\system32>netstat -nab

    Active Connections

      Proto  Local Address          Foreign Address        State
      TCP                 LISTENING
      TCP                LISTENING
      TCP                LISTENING

    This means that Skype is running in your machine, then change the skype options as below:In skype:
    Go to Tools -> Options -> Advanced -> Connections and uncheck the box "use port 80 and 443 as alternative".


    If you are not using skype still problem exists

    *change the port for either default IIS websites or for the XAMPP port which are referring to port *80.

    you can refer to these url's

    for IIS-

    for XAMPP-

    let us know if you are still facing the problem, we are glad to help you.


    Ravindra Aditya

    Sunday, August 9, 2015 4:08 AM
  • This is not working for me my netstat -nab is reporting slightly different results - it was unable to enumerate the user

     TCP    [::]:80                [::]:0                 LISTENING
    Can not obtain ownership information
     TCP    [::]:135               [::]:0                 LISTENING
     TCP    [::]:445               [::]:0                 LISTENING
    Can not obtain ownership information

    Thanks in advance


    Wednesday, March 29, 2017 10:00 PM
    • Proposed as answer by George Herson Wednesday, September 20, 2017 6:31 PM
    Wednesday, September 20, 2017 6:30 PM
  • this will not work if you are planing on also using IIS on different ports (:81 for instance.)
    Saturday, September 1, 2018 11:40 PM