This is usually an issue caused by a collision in the http ports. IIS already accepts port number 80, and apache tries to take 80, and a collision occurs.
Launch apache with a different port and it will start:
Step 1: Stop the Wamp Services. Close wamp manager
Step 2: \ Bin \ Apache \ apache2.4.9 \ conf \ httpd.conf Change the port to 8080 (or any other free port)
Step 3: \ wampmanager.tpl Note. The change in wampmanager.ini does not work, because it was restored from the .tpl file, change the port setting that you selected above to localhost.
eg. http: // localhost to http: // localhost: 8080
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