I have just installed XAMPP and everything works fine except that I can\'t get apache to run. It seems that port 80 is the problem, I have disabled Skype to use port 80 but
If you just want to make Apache run an don't mind which port it is running on, do the following:
In the XAMPP Control Panel, click on the Apache - 'Config' button which is located next to the 'Logs' button.
Select 'Apache (httpd.conf)' from the drop down. (notepad should open)
Do Ctrl + F to find '80'. Click 'find next' three times and change line Listen 80 to Listen 8080
Click 'find next' again a couple times until you see line ServerName localhost:80 change this to ServerName localhost:8080
Do Ctrl + S to save and then exit notepad.
Start up Apache again in the XAMPP Control Panel, Apache should successfully run.
Use http://localhost:8080/ in your browser address bar to check everything is working.
EDIT
Also you may have problems running XAMPP while running IIS. If you are running IIS it might be worth stopping the service then starting XAMPP.