Récupération de donnéés

Bonjour,
suite à un gros bug de windows, j'ai créer une clef usb bootable ubuntu. Cependant, quand je souhaite acceder a mon disque dur OS, il me revoit ceci :
" You do not have the permissions necessary to view the contents of "OS".

Unable to mount OS
Error mounting: mount exited with exit code 14: Windows is hibernated, refused to mount.
Failed to mount '/dev/sda2': Operation not permitted
The NTFS partition is hibernated. Please resume and shutdown Windows
properly, or mount the volume read-only with the 'ro' mount option, or
mount the volume read-write with the 'remove_hiberfile' mount option.
For example type on the command line:

mount -t ntfs-3g -o remove_hiberfile /dev/sda2 /media/OS"

Je me tourne donc vers vous afin de savoir ce que je dois faire. Merci bien!