OK, the NTFS partition isn't mounted, so we'll need to see how your hard drive is partitioned. In a terminal, again, enter the following:
(enter root password)
fdisk -l > fdisk.txt
In case you're not sure, the second command is fdisk dash(lowercaseL). That will create the text file name fdisk.txt in your home directory, which you can view and copy. User root will own the file, but if you copy it somewhere else in you home directory, you will own the copy. The file will contain a list of all the partitions on your drives. Anyway, paste the contents of the file in your next post.
One question comes to mind. Do you want to be able to read and write to the Windows partition, or do you just want to be able to read the files that are there?