Hi,
I tried last week to install Moodle on MS Vista, with Xampplite or Xampp and Moodle 1.7 and 1.8. In all combinations I got trouble while writing the config.php. The systems stopps without writing the config.php. I was logged in as admin on vista and had all rights to write file in the moodle folder.
The Moodle system works well after editing the confiog file manually. So I think its not a problem of Moodle, but in the rights management of MS Vista.
I checked the apachefriends /Xampp forum but didn't find any solutions. It seems that several features of xampp are not working under Vista (like portcheck).
If you have any idea whats the reason and a solution for this problems please post it here.
Ralf