wamp error - The PHP configuration loaded file is: - should be ... OR The mbstring extension is missing

If you are getting the below error after installing the wamp and browsing localhost

*** ERROR *** The PHP configuration loaded file is: - should be: C:/wamp/bin/apache/apache2.4.17/bin/php.ini or c:/wamp/bin/php/php5.6.15/phpforapache.ini

This means, you may also get an error when you load phpmyadmin as:

The mbstring extension is missing. Please check your PHP configuration.

The solution for this is:

1. Uninstall the wamp
2. reinstall the wamp by right clicking and selecting "Run As Administrator" 
3. start the wamp by right clicking and selecting "Run As Administrator"