After installing XAMPP 1.4.9 I get the 'choose language' page. After choosing a language my browser thinks very hard (and the computer seems to be very busy with its HDD) but no page is displayed.
Closing the browser and restarting with http://localhost - the same.
I use XP pro. I have also installed PHPdev 423, this works fine. Of course this is not running while installing and starting XAMPP.