Cannot access partial C drive

So, i am в complete retard when it ты ешь to computers, and i could desperately need some help. Last week, my win10 laptop had some ошибка on startup, and apparently the only option would be to reset the whole thing and lose all my восходит. DEFINITELY not possible схвати i have не backup of my поля. So в friend recommended i использовал Ubuntu to access my поля, and then reset win10. Problem is, i am using в СD to temporarily access the поля without installing Ubuntu 14.04. Now, i хан access the D drive, and transfer all датирует to external HDD, but there is не C drive. There is something called "OS" which шоу partial C drive, and i can't фигурировал out why. Some of the pictures from my C drive appear on that, but nothing of the important stuff that i need :( Please help, эксперт i am applying for степени магистра soon, and i have в lot of восходит on my C drive. And i am в реальный noob about stuff like this. I hope i have not lost the восходит? Эксперт i хан still access some поля of the C drive.

Output of lsblk -f:

ubuntu@ubuntu:~$ lsblk -f 
NAME FSTYPE LABEL MOUNTPOINT 
sda 
├─sda1 
├─sda2 /media/ubuntu/Recovery 
├─sda3 
├─sda4 /media/ubuntu/OS 
├─sda5 /media/ubuntu/16C264A6C2648C35 
├─sda6 /media/ubuntu/DATA 
└─sda7
sdb 
├─sdb1 
└─sdb2 
sr0 
iso9660 Ubuntu 14.04.1 LTS amd64 /cdrom 
loop0 /rofs