Just saw an excellent tweet by @chadmyers:

FYI, to find which process has an open port: netstat -o -n -a | findstr 0.0:80
Where “80” is the port in question (i.e. 80, 443, etc). Get the PID (i.e. 5688) and open Task Manager, proc tab, add the PID column, sort

Awesome hack – i didn’t know this. More specifically, I didn’t know Windows had a poor-man’s grep in findstr

Take that, Skype!

By default, skype grabs a hold on incoming requests on port 80, and 443 (https) presumably as a measure to bust through firewalls.

This causes problems when you’re trying to configure IIS.

Moral: If you’re installing IIS and you have Skype running, you should turn off the option in Skype to listen to incoming requests on port 80 and 443