Using the last Windows Moodle Distribution Moodle 2.7dev version, the installation stops with the following message:
Moodle 2.7 or later requires at least PHP 5.4.4 (currently using version 5.3.5).
Please upgrade your server software or install older Moodle version.
Effectively the PHP requirements has been recently changed and the package needs an update.
I don't know where to put a bug in the tracker for this.
Pierre