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)