Thanks for your reply.
I had already browsed intensely around the Net before initiating this tread, but this morning I did come around the following solution:
Step 1 - From XAMPP Control Panel, under Apache, click the Config button, and select the Apache (httpd.conf).
Inside the httpd.conf file, find the line that says:
And change the 80 into any number / port you want, for example 8080.
Still from the httpd.conf file, there is another line that says:
And change 80 to 8080.
Step 2 - From XAMPP Control Panel, under Apache, click the Config button again, but this time select the Apache (httpd-ssl.conf). Inside the httpd-ssl.conf file, find line that says
And change the 443 into any number / port you want. Foe example 4433 as the new port number.
Still from the httpd-ssl.conf file, find another line that says
And change 443 to 4433.
Remember to save httpd.conf file and httpd-ssl.conf after you make some changes. Then restart the Apache service.
XAMPP (Apache) is now running fine.