Je n'arrive pas à activer apache sous xampp

Bonjour,
besoin d'aide svp.
voila mon message d'erreur
11:45:18 [Apache] Status change detected: stopped
11:45:18 [Apache] Error: Apache shutdown unexpectedly.
11:45:18 [Apache] This may be due to a blocked port, missing dependencies,
11:45:18 [Apache] improper privileges, a crash, or a shutdown by another method.
11:45:18 [Apache] Press the Logs button to view error logs and check
11:45:18 [Apache] the Windows Event Viewer for more clues
11:45:18 [Apache] If you need more help, copy and post this
11:45:18 [Apache] entire log window on the forums

Merci d'avance