Just downloaded moodle 2.0 and trying to install on XAMP. I have done many moodle installs in the past without problems.
Getting this error blocking message:

Checking your environment ...
We are checking if the various components of your system meet the system requirements
Warning: require_once(HTML/QuickForm/DHTMLRulesTableless.php) [function.require-once]: failed to open stream: No such file or directory in C:\Program Files\xampp\htdocs\moodle20\moodle\lib\formslib.php on line 26
Fatal error: require_once() [function.require]: Failed opening required 'HTML/QuickForm/DHTMLRulesTableless.php' (include_path='.;C:\Program Files\xampp\php\pear\') in C:\Program Files\xampp\htdocs\moodle20\moodle\lib\formslib.php on line 26