Apache shutdown unexpectedly. please help

[vkwyd]

10:22:21 PM [main] Initializing Control Panel
10:22:21 PM [main] Windows Version: Pro 64-bit
10:22:21 PM [main] XAMPP Version: 5.6.15
10:22:21 PM [main] Control Panel Version: 3.2.2 [ Compiled: Nov 12th 2015 ]
10:22:21 PM [main] You are not running with administrator rights! This will work for
10:22:21 PM [main] most application stuff but whenever you do something with services
10:22:21 PM [main] there will be a security dialogue or things will break! So think
10:22:21 PM [main] about running this application with administrator rights!
10:22:21 PM [main] XAMPP Installation Directory: "c:\xampp\"
10:22:21 PM [main] Checking for prerequisites
10:22:21 PM [main] All prerequisites found
10:22:21 PM [main] Initializing Modules
10:22:22 PM [main] Starting Check-Timer
10:22:22 PM [main] Control Panel Ready
10:22:26 PM [Apache] Attempting to start Apache app...
10:22:27 PM [Apache] Status change detected: running
10:22:27 PM [mysql] Attempting to start MySQL app...
10:22:29 PM [mysql] Status change detected: running
10:44:06 PM [Apache] Status change detected: stopped
10:44:06 PM [Apache] Error: Apache shutdown unexpectedly.
10:44:06 PM [Apache] This may be due to a blocked port, missing dependencies,
10:44:06 PM [Apache] improper privileges, a crash, or a shutdown by another method.
10:44:06 PM [Apache] Press the Logs button to view error logs and check
10:44:06 PM [Apache] the Windows Event Viewer for more clues
10:44:06 PM [Apache] If you need more help, copy and post this
10:44:06 PM [Apache] entire log window on the forums

[Altrea]

Apache error.log