Thanks for all your suggestions.
I tried all of your suggestions, but still MySQL doesn't make any difference.
I did right click on the XAMPP Control Panel and selected "Run as Administrator". When I click on Start for MwSQL, the button blinks from Blue to grey, and in the status box at the bottom it returns the message saying, "MySQL service started".
I made sure the checkbox next to run as a service was checked, restarted the computer and went to http://localhost/
and looked at status, but still MySQL is not running. The status says "DEACTIVATED".
So what's my next step?