error apache variables in wamp code example

Example: wamp apache cannot start

C:\Users\Admin>cd C:\wamp\bin\apache\apache2.4.9\bin

C:\wamp\bin\apache\apache2.4.9\bin>httpd -t
Syntax OK

C:\wamp\bin\apache\apache2.4.9\bin>httpd -k start
[Thu Apr 23 14:14:52.150189 2015] [mpm_winnt:error] [pid 3184:tid 112] 
(OS 2)The system cannot find the file specified.  : AH00436: 
No installed service named "Apache2.4".

C:\wamp\bin\apache\apache2.4.9\bin>