how to change port number of Apache server in windows OS

Go to your apache-tomcat Installation folder there you find conf folder inside that server.xml file will be there.. You can change the port number and configuration setting for your server. Drive:\apache-tomcat\conf\server.xml

thanks for response but only changing port number in: C:\xampp\apache\conf\httpd.conf didn't work (apache couldn't start) so with above mention change, we have to change port number in another file to make it work i have changed in : C:\xampp\apache\conf\extra\httpd-ssl.conf in above file find (if port number you want is 85) Listen 443 change it to Listen 85 find change it to find ServerName localhost:443 change it to ServerName localhost:85 the port number in C:\xampp\apache\conf\httpd.conf and C:\xampp\apache\conf\extra\httpd-ssl.conf should be different. restart Apache service in XAMPP Control Panel and type in your browses address bar : http://localhost:'port number'/

It is quite easy .You need to make few changes to httpd.conf file as follows: Listen 80 to Listen 8080 and ServerName localhost:80 to ServerName localhost:8080 For more detailed info with screenshots ,you can refer this - http://www.superpctricks.com/2013/11/running-iis-and-apache-on-same-server.html