community. I'm new to Ubuntu, having used it for only a few months on a different machine, dual booting with Vista. I'm now trying to dual boot Ubuntu Quantal Quetzal with Windows 8, upgraded to from Windows 7. However, when I'm trying to install, on the "choose how to install" or "other operating systems detected" screen, the installer tells that Ubuntu has found multiple operating systems on the hard drive. In reality, I only have one, and that is Windows 8. What should I do to deal with this problem? I don't think it has something to do with the "secure boot" feature of Windows 8 because my laptop does not support it.