wamp无法正常启动

前天是可以正常启动的，但是今天就不行了，apache错误日志报出错误如下:请大神解答，不胜感激

[Mon Aug 10 13:30:39.002985 2015] [mpm_winnt:notice] [pid 11968:tid 392] AH00455: Apache/2.4.9 (Win64) PHP/5.5.12 configured -- resuming normal operations
[Mon Aug 10 13:30:39.002985 2015] [mpm_winnt:notice] [pid 11968:tid 392] AH00456: Apache Lounge VC11 Server built: Mar 16 2014 12:42:59
[Mon Aug 10 13:30:39.002985 2015] [core:notice] [pid 11968:tid 392] AH00094: Command line: 'D:\\wamp\\bin\\apache\\apache2.4.9\\bin\\httpd.exe -d D:/wamp/bin/apache/apache2.4.9'
[Mon Aug 10 13:30:39.012985 2015] [mpm_winnt:notice] [pid 11968:tid 392] AH00418: Parent: Created child process 12076
[Mon Aug 10 13:30:39.453010 2015] [mpm_winnt:crit] [pid 11968:tid 392] AH00419: master_main: create child process failed. Exiting.

回复内容：

前天是可以正常启动的，但是今天就不行了，apache错误日志报出错误如下:请大神解答，不胜感激

[Mon Aug 10 13:30:39.002985 2015] [mpm_winnt:notice] [pid 11968:tid 392] AH00455: Apache/2.4.9 (Win64) PHP/5.5.12 configured -- resuming normal operations
[Mon Aug 10 13:30:39.002985 2015] [mpm_winnt:notice] [pid 11968:tid 392] AH00456: Apache Lounge VC11 Server built: Mar 16 2014 12:42:59
[Mon Aug 10 13:30:39.002985 2015] [core:notice] [pid 11968:tid 392] AH00094: Command line: 'D:\\wamp\\bin\\apache\\apache2.4.9\\bin\\httpd.exe -d D:/wamp/bin/apache/apache2.4.9'
[Mon Aug 10 13:30:39.012985 2015] [mpm_winnt:notice] [pid 11968:tid 392] AH00418: Parent: Created child process 12076
[Mon Aug 10 13:30:39.453010 2015] [mpm_winnt:crit] [pid 11968:tid 392] AH00419: master_main: create child process failed. Exiting.

Created child process 12076
create child process failed. Exiting.
创建子进程失败，你看看是不是端口被占用了啊，以前有用过wamp，有时候启动失败是80端口被占用了

netstat -aon | find ":80"查看80端口是否占用，如果占用杀死进程tasklist /fi "PID eq 123"123为netstat listen的pid