Why won't Apache start in XAMPP?

Question

Apache HTTP Server

Apache does not start - I quote what it says in the console:

2:40:08  [main] 	Initializing Control Panel
2:40:08  [main] 	Windows Version: Windows 7 Home Premium SP1 64-bit
2:40:08  [main] 	XAMPP Version: 7.2.15
2:40:08  [main] 	Control Panel Version: 3.2.2  [ Compiled: Nov 12th 2015 ]
2:40:08  [main] 	Running with Administrator rights - good!
2:40:08  [main] 	XAMPP Installation Directory: "c:\xampp\"
2:40:08  [main] 	Checking for prerequisites
2:40:08  [main] 	All prerequisites found
2:40:08  [main] 	Initializing Modules
2:40:08  [main] 	Starting Check-Timer
2:40:08  [main] 	Control Panel Ready
2:40:10  [Apache] 	Attempting to start Apache app....

I'm running with administrator rights. Ports changed everything.

Answer 1

Port 80 or 443 may be busy. For example Skype sits on the 80th.
Still can in conf. the file cant be, but more often - skype