Comment on Cygwin Walkthrough and Beginners Guide – Is it Linux for Windows or a POSIX Compatible Alternative To PowerShell? by Ben

I haven’t used IIS Server in a very long time but I assume its Windows service has locked down port 80 for its own use, even after the server is shutdown.

Try changing the default port on Lighttpd or IIS Server.

For Lighttpd in Cygwin:

nano -B etc/lighttpd/lighttpd.conf

Change the line

server.port = 80

To something unused say

server.port = 8080

Save, exit nano and then try running lightttpd again.

/usr/sbin/lighttpd -f /etc/lighttpd/lighttpd.conf