Well "something happened", LOL -
The message is indicating that the config.inc.php file for phpMyAdmin is no longer valid. (you should save a copy of the file before you tinker with it, you may need it to figure out what is really wrong - for instance - it may turn out you are not able to access MySQL)
You can either try 'mending it' manuallyhttp://www.apachefriends.org/en/faq-xam ... #password1or - perhaps -
just unpack a fresh config.inc.php from a clean XAMPP download (same version) and replace your file.or
use this Tip/FAQ to reset it (and the MySQL root) to the XAMPP defaults.
permalink: http://bravo.newnetenterprises.com/word ... r-password
Just keep ONE thing in mind - that info DID NOT CHANGE ITSELF... Some thing you did or someone with access did or someTHING with access (a progam or script or data restoration) changed the settings.