Here is the exact procedure to turn off port 80:
Using Skype 18.104.22.168 (I believe latest version)
Under the Tools menu > in Options > in Advanced > in Connection
there is a text field to set the port number - mine by default is 59040 and I left it alone
below there is a checkbox "Use port 80 and 443 as alternatives for incoming connections"
I unticked the box and Skype and xammp are working fine
from The Webmaster Forums
And I contacted Kai and Kay about the conflict..
I speak italiano cosi malo - it was a long time ago
I lived one block from il Colosseo and I remember once during a traffic jam all the cars drove around Circo Massimo!
Arianna, feel free to PM me or you can IM me right from my website at http://netsperience.org
- but don't expect me to parlo molto italiano - maybe you can help get some of the rust off!