If you're with Win98 or less, it's preferable that you use
/dev/hda1 /mnt/winc vfat noauto 0 0
But if you're with WinXP, you have to use:
/dev/hda1 /mnt/winc ntfs ro,noauto,umask=0222 0 0
If none of this works, try:
/dev/hda1 /mnt/winc auto noauto 0 0
-noauto will make operations faster
-ro makes disk real-only
-umask=022 makes disks read-only(just to make sure!)
Most distros don't have ntfs support so:
http://linux-ntfs.sourceforge.net/