Mensagem de erro:
Error mounting /dev/sda2 at /media/Windows 8: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,dmask=0077,fmask=0177" "/dev/sda2" "/media/Windows8"' exited with non-zero exit status 14: Windows is hibernated, refused to mount.Solução:
Failed to mount '/dev/sda2': Operation not permitted
The NTFS partition is in an unsafe state. Please resume and shutdown
Windows fully (no hibernation or fast restarting), or mount the volume
read-only with the 'ro' mount option.
A solução é simples básica, desligando essa hibernação travestida de shutdown. No próprio site da Microsoft tem as instruções.
Fonte: http://social.technet.microsoft.com/wiki/pt-br/contents/articles/13657.desativando-hibernacao-no-windows-8.aspx