I installed IIS7 and Xampp 2.5 on my laptop (Windows 7). However, I cannot start Apache because the port 80 was not available (when I stop IIS7), but I can start IIS7. I don't know why. Anybody give me a hint pls :)
Thank you so much :)
If port 80 is unavailable:
Also, if you are not already doing so, start with a fresh install of XAMPP (i.e. unmodified httpd.conf). You may also consider changing the port Apache listens on (the 'Listen' directive) to see if that resolves the problem.