The solution is already in the error message you offer:

Please resume and shutdown Windows fully (no hibernation or fast restarting), or mount the volume read-only with the 'ro' mount option.

Even if you "fully" poweroff or shutdown the computer, Windows may hilbernate. So just mount the Windows partition as read only (add ro flag in the item of the Windows partition in your /etc/fstab file).

PS there're already many questions being asked about this:

http://askubuntu.com/questions/280530/how-do-i-mount-a-hibernated-partition-with-windows-8-in-ubuntu

The solution is already in the error message you offer:

Please resume and shutdown Windows fully (no hibernation or fast restarting), or mount the volume read-only with the 'ro' mount option.

Even if you "fully" poweroff or shutdown the computer, Windows may hilbernate. So just mount the Windows partition as read only (add ro flag in the item of the Windows partition in your /etc/fstab file).

PS there're already many questions being asked about this:

https://askubuntu.com/questions/280530/how-do-i-mount-a-hibernated-partition-with-windows-8-in-ubuntu