OS X can "see" just about any disk and that includes disks that are formatted as NTFS (normal Windows format)
The disk should mount on the desktop unless there is something wrong with it.
To "repair" that disk, assuming it is still formatted as NTFS, you will need to be working on it on the PC and using PC repair tools.

You say that in Disk Utility, the disk is seen. Select the disk and choose Erase or Partition. Choose the type of format that you require, HFS+(journaled), and erase the disk.
While Disk Utility can "see"an NTFS formatted disk, I don't believe that it can perform any form of maintenance on it.