After I rebooted today, I tried pulling up sites on my local IIS. I kept getting a black page. Nothing in the source. We finally figured out that Skype was using port 80 and 443 as alternatives for incoming connections.
In Skype, go to :
Tools -> Options -> Advanced -> Connection
On this option page you need to uncheck "Use port 80 and 443 as alternatives for incoming connections". Restart Skype and you should find you have no more issues (from http://amcrouch.blogspot.com/2012/02/skype-iis-clash.html
