I brought a new Notebook which has pre-installed Windows 8.1 with an uefi* (-Bios) and secure boot*. (* can switch or turn so off, still no success) When i try to install Ubuntu 12.04.3, the installer doesn't recognize Windows 8.1. There were options, to delete the whole disk or do something else. The second option, shows a few partitions (NTFS) but no Windows. The Ubuntu 13.10 version even did start on my notebook, it gets frozen during start up. (I thought. maybe the newer one will recognize Windows.) I'm not very confident in manipulating grub, I hope there is an easy way or an easy description. Gparted shows: Device Type Size Used /dev/sda freespace 1MB /dev/sda ntfs 1073MB 408MB /dev/sda2 efi 104MB 52MB /dev/sda3 ntfs 134MB 45MB /dev/sda4 ntfs 988465MB 23947MB /dev/sda5 ntfs 10424MB 9483MB free space 0MB /dev/sdb1 fat32 16929MB 9412MB (USB-drive Ubuntu-image)