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I want to install Ubuntu beside my windows 8 but I made a mistake that i installed only Ubuntu ,but when I logged in Ubuntu and went to open my partitions , an error appeared said that ""Error mounting /dev/sda5 at /media/abdo/mohamed: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,dmask=0077,fmask=0177" "/dev/sda5" "/media/abdo/mohamed"' exited with non-zero exit status 14: The disk contains an unclean file system (0, 0). Metadata kept in Windows cache, refused to mount. Failed to mount '/dev/sda5': 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"". Please i need help here.