Windows mounts suddenly going read-only

[timbuck2]

For a couple of days my windows7 and windows10 drives have been going read-only and I have to reboot and check their filesystems.

They are auto-mounted via fstab:

Code:

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda1 during installation
UUID=a2fbbae1-060e-4751-bec4-653e2c031c9f /  ext4    errors=remount-ro 0       1
UUID=CC36728936727474    /mnt/windows10    ntfs    defaults    0    0
UUID=6460FFA960FF7FDA    /mnt/windows7    ntfs    defaults    0    0
/swapfile                                 none            swap    sw              0       0
/dev/fd0        /media/floppy0  auto    rw,user,noauto,exec,utf8 0       0

What could be causing this issue?  It just started yesterday and happened today a couple of times after I restarted LL.  Are they not being unmounted properly?