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I having some trouble installing Ubuntu on my computer. I think the issue is with my Windows partition not being mounted correctly.

I am currently "trying" Ubuntu using LiveUSB. I am able to mount every single partition except for my Windows 8 partition. When I try to mount it, it says

Error mounting /dev/sdb5 at /media/ubuntu/OS: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=999,gid=999,dmask=0077,fmask=0177" "/dev/sdb5" "/media/ubuntu/OS"' exited with non-zero exit status 14: Windows is hibernated, refused to mount.
Failed to mount '/dev/sdb5': 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.

Now, I am quite sure I shut down my Windows partition before starting LiveUSB. I also disabled Fast Restart on my Windows OS. What is going wrong here?

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I don't know what is wrong in your senario as I don't have windows 8, but you can check out this:, and also I think that you want to disable hybrid sleep? I am not sure though. – DaboRoss Jun 9 '13 at 4:43

Boot windows and properly shutdown.

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