I have a Sony Vaio E Series laptop that came with Windows 8 installed. I later updated to Windows 8.1. I have been trying to install a Linux distro as a dual boot option.

Today, I shrunk the main partition on my C: drive to make room for a Linux installation (I made 16GB of free space). I burned Kali Linux 1.1.0a to a DVD, turned off SecureBoot and QuickStart in Windows and my UEFI settings, changed my default boot order to Optical Drive then Hard Disk. My Vaio wouldn't boot the DVD initially, so I put the boot setting to Legacy.

I used the Kali Linux graphical interface for installation. I chose the free space made during the partition shrinking, and let it auto-install there.
Installation went fine. I restarted my laptop and removed the Live DVD, but "Operating System not found" kept showing at startup. I put the Live DVD back in, and went through the steps at https://askubuntu.com/a/478153 to try to make my computer recognize the partitions on my hard drive. Restarted, and still "Operating System not found".

Running lsblk from the Live DVD gives the following:

Code:
    NAME        MAJ:MIN    RM     SIZE   RO  TYPE  MOUNTPOINT
    sda           8:0       0   931.5G    0  disk
    |-sda1        8:1       0     260M    0  part /media/SONYSYS
    |-sda2        8:2       0     1.5G    0  part /media/Windows RE tools
    |-sda3        8:3       0     260M    0  part
    |-sda4        8:4       0     128M    0  part
    |-sda5        8:5       0   876.4G    0  part
    |-sda6        8:6       0     450M    0  part /media/22C625A0C6257567
    |-sda7        8:7       0    36.6G    0  part /media/Recovery
    |-sda8        8:8       0       1M    0  part
    |-sda9        8:9       0    15.3G    0  part /media/ef8f6281-bace-4247-8b29-24cdcf57a0d3
    `-sda10       8:10      0     715M    0  part
    sr0          11:0       1      2.9G   0  rom  /lib/live/mount/medium
    loop0         7:0       0      2.6G   1  loop /lib/live/mount/rootfs/filesystem.squashfs
Best case scenario, I would love to get Kali Linux and Windows 8.1 working again. At the very least, I just want my Windows back. If you need any more information than I have provided, please tell me what you need. Thank you very much.