error when run apache

[Iwan29036]

Error: Apache shutdown unexpectedly.
13:57:21 [Apache] This may be due to a blocked port, missing dependencies,
13:57:21 [Apache] improper privileges, a crash, or a shutdown by another method.
13:57:21 [Apache] Press the Logs button to view error logs and check
13:57:21 [Apache] the Windows Event Viewer for more clues
13:57:21 [Apache] If you need more help, copy and post this
13:57:21 [Apache] entire log window on the forums