port 80.

[xymalf]

Error: Apache shutdown unexpectedly.
22:05:57 [Apache] This may be due to a blocked port, missing dependencies,
22:05:57 [Apache] improper privileges, a crash, or a shutdown by another method.
22:05:57 [Apache] Press the Logs button to view error logs and check
22:05:57 [Apache] the Windows Event Viewer for more clues
22:05:57 [Apache] If you need more help, copy and post this
22:05:57 [Apache] entire log window on the forums

I thought the above problem was due to Skype so I uninstalled Skype.
Then I set server name:81 for port 81
but still same fault services won't start. Is it Bitdefender firewall?
How do I solve this error as log files contain nothing.