Free port 80 in windows

Problem:

While you are using certain application like nginx, apache etc. which run on port 80, you may face issue sometimes with the starting up of these applications reason being the port 80 already in use by some other application. 

Solution:

In order to free the port, follow these steps:

1.    Click Start > Settings > Ethernet >Network and Internet > Windows Firewall

2.       In the left pane, click Advanced Settings

3.       In Windows Firewall with Advanced Security, click Inbound Rules.

4.    Sort Items by "Network Protocol" column

4.       Find Local Port 80 with Protocol TCP.  It might be "World Wide Web Services (HTTP Traffic-In)" or Citrix or Skype or Apache

5.       Once you find it, stop or disable that rule from Windows Services 

Try starting your application again.