I have been attempting to download the latest version of Piwik this week and all I get is the XAMPP install page. Is Piwik no longer available?
Problem solved. piwik.org was in the hosts file.
Why was it ? what tool are you using that set the domain in your hosts file ? are you using some kind of spam blocker or software ? we must find out what put piwik.org in your host file as it’s a bug of this software!