EDIT: DOING THIS MIGHT HAVE DANGEROUS CONSEQUENCES and Windows might fail to boot or corrupt the filesystem upon booting.
Use ntfsfix in the terminal, even if you can't access Windows
sudo ntfsfix /dev/sdXY
where XY is the partition, e.g. a2
(/dev/sda2
) or b1
(/dev/sdb1
)
ntfsfix repairs some fundamental NTFS inconsistencies, resets the NTFS journal file and schedules an NTFS consistency check for the first boot into Windows.