After installing the apachee server, sometimes you may unable to start the server due to port conflicts with another program or service which are running on your computer. The default starting port is 80 for apachee. To fix this simply, you are able to configure an another port for starting apachee server.
For do this, you should go to your apachee installed folder and find the "conf"' folder. From the conf folder, find the file "httpd.conf" file.
Open this file from your text editor and search the word "port"
#Listen 80
Listen 8080
Add a new port as above highlighted. And comment the conflicted port as above. Save the changes.
After that, start the apachee server. Cheers !