"A week or so after being thrown off of the default Ubuntu 13.04 disc image the Ubuntu website is now also warning users not to use WUBI to try Ubuntu 12.10.
When clicking the ”Install from Windows’ link on the Ubuntu download page the following banner appears, advising against using the WUBI tool with Windows 8 or UEFI hardware.
Instead, Ubuntu recommends installing Ubuntu 12.10 64bit on its own dedicated partition – a task that is made easy with Ubuntu’s installer, but not entirely without risk."