Port 80 is being used by PID 4

Question

_{Wednesday, January 3, 2018 1:23 PM}

Team,

Port 80 on my Windows 10 PC is being used by PID 4. I cannot kill PID4 as its System and Kernel. I need to release port 80 so that I can use it for http related stuff. 

I checked my PC but could not find Apache or IIS. Please help.

All replies (4)

_{Wednesday, January 3, 2018 1:46 PM}

what is displayed when open "localhost:80" in a browser?

_{Thursday, January 4, 2018 2:46 AM}

In addition, you can also refer to this case and check if it can help you.

Port 80 is being used by SYSTEM (PID 4), what is that?

https://stackoverflow.com/questions/1430141/port-80-is-being-used-by-system-pid-4-what-is-that

Please Note: Since the websites are not hosted by Microsoft, the links may change without notice. Microsoft does not guarantee the accuracy of this information.

Best Regards,

Tao

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_{Monday, April 16, 2018 6:04 PM | 1 vote}

I had the same issue. My tomcat was not starting because the port 80 is being used by PID 4 and I didn't have IIS either. I tried a bunch of options but this is what worked for me ( I have a windows machine).

**One of the solutions provided here **https://superuser.com/questions/352017/pid4-using-port-80

• Launch RegEdit.

• Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\HTTP

• Change the value of "start" to 4, which means disabled.

• Reboot your computer.

_{Friday, June 1, 2018 1:24 PM}

Unfortunately after making changes in the registry I cannot use printer anymore. I have wireless printer.