It looks like you reinstalled Windows 7 to F from C since that's the only way the booted OS on partition F (signified by the Boot label) would not appear as C itself: When you ran the installer from C it locked out that letter so it incorrectly boots as F.
This is not desirable so you should do it over after you read carefully the steps to correctly Clean Reinstall - Factory OEM Windows 7
- these steps are the same for retail.
Back up all files on the target HD, power down to unplug the HD which you don't want to install Windows 7 upon, boot the installer to delete all partitions and create New to Format as shown in Steps 6/7 of Clean Install Windows 7.
After install, you can plug back in the other HD, back up its data, then correctly delete the unwanted OS by Deleting it's partition(s), repartition as desired. Partition or Volume - Delete Partition or Volume - Create New