Or if your feeling a little adventurous and want the drive to actually not be mounted at all... you can create an fstab file in /etc and keep it from being mounted on bootup....
Just put this line in /etc/fstab
LABEL=VOLNAME none fat32 rw,noauto 0 0
Where VOLNAME is the name of your windows volume
If you format or change the format of your windows partition to NTFS, just substitute NTFS for fat32 in the line above.
Hope that helps.... 🙂