I installed Ubuntu 13.10 on a Samsung NP300EC5 running Windows 8.1 after disabling "Secure Boot"
After installation no Windows items appeared in grub menu.
I ran BootRepair, that told me "everything OK".
After reboot no way to run Windows: all Windows items execute Windows repair without success.
Output of Boot Repair at http://paste.ubuntu.com/6342469/
Any suggestion?