XAMPP Control Panel v3.2.4 aiuto?

[apec]

Buonasera,

15:19:25 [Apache] Error: Apache shutdown unexpectedly.
15:19:25 [Apache] This may be due to a blocked port, missing dependencies,
15:19:25 [Apache] improper privileges, a crash, or a shutdown by another method.
15:19:25 [Apache] Press the Logs button to view error logs and check
15:19:25 [Apache] the Windows Event Viewer for more clues
15:19:25 [Apache] If you need more help, copy and post this
15:19:25 [Apache] entire log window on the forums

Usando Xampp mi da qusto errore, ho provato cambiare la Main port e ssl port ma mi da sempre lo stesso errore.uso un pc windows 7 home premium, service pack 1.ho fatto ultimi aggiornamenti del windows.
cosa posso fare?