I'm currently running XAMPP 1.7.0 on a server with Windows Server 2008 installed.
UAC has been disabled, if that helps.
When I go to http://localhost/security the page fails to load, however it will load when I click on the Dutch language option on the security page.
After that, when I try to access http://localhost/security/xamppsecurity.php it brings up a white page with the error message "Internet Explorer cannot display this page" on it.
The same error message occurs when I try to access PHPMyAdmin, and despite me uninstalling and reinstalling XAMPP several times, the problem still occurs.