Apache not working suddenly

[nperera]

Hello, I using apache with xampp v3.2.2 and today suddenly apache got freez and now apache not starting. I have change the ports also. but wont work. please refer below details on xampp, apache version is Apache2.4

12:14:21 PM [Apache] Error: Apache shutdown unexpectedly.
12:14:21 PM [Apache] This may be due to a blocked port, missing dependencies,
12:14:21 PM [Apache] improper privileges, a crash, or a shutdown by another method.
12:14:21 PM [Apache] Press the Logs button to view error logs and check
12:14:21 PM [Apache] the Windows Event Viewer for more clues
12:14:21 PM [Apache] If you need more help, copy and post this
12:14:21 PM [Apache] entire log window on the forums

Please help.