nginx: bind() to 0.0.0.0:80 failed on Windows [closed]

I've been using nginx without any problem on windows for the last few months. Today when I tried to start it up, I got this error:

nginx: [emerg] bind() to 0.0.0.0:80 failed (10013: An attempt was made to access a socket in a way forbidden by its access permissions)

Why did this start happening all of a sudden? I didn't change any configs or anything.

Solution 1:

Check Skype.

Skype automatically updated itself, and turned the "use port 80" option back on.

It's in settions->advanced.

Solution 2:

Check which ports are being used on your system.

There are some programs which bind port 80. For example TeamViewer, Skype, etc.

For an easy test type http://localhost in your browser and check which service appears.

Or ou can use a programm like CurrPorts by NirSoft.

Solution 3:

You can try run in CMD:

netstat -a | find "LISTENING"

also there was a piece of software called TCPView, which is very cool, and shows all runing process/occupied ports.