I may have typed wrong but it dosent workenter CMD - write:
netstat -o -n -a | findstr 0.0:80
find out which process id is occupying port 80
enter task manager - find and kill that process id in the "process tab".
Uninstall & remove the xampp shit you are using
install Uniform Server
Enjoy.
What operating system do you have? (Include the service pack if you may)?
If you have teamviewer running it might occupate the port, check ur process list