Apache failing to start

[reba]

Error: Apache shutdown unexpectedly.
10:26:22 AM [Apache] This may be due to a blocked port, missing dependencies,
10:26:22 AM [Apache] improper privileges, a crash, or a shutdown by another method.
10:26:22 AM [Apache] Press the Logs button to view error logs and check
10:26:22 AM [Apache] the Windows Event Viewer for more clues
10:26:22 AM [Apache] If you need more help, copy and post this
10:26:22 AM [Apache] entire log window on the forums