why does shrink volume only display 350gb available to shrink out of a total of 703 gb on (C

drive? the Hewlett Packard is fresh out of the box. it was partitioned with 200MB system files, the 703GB partition contains 25GB of files, 150MB partition unallocated. a (D

drive HP created for emergency (nice feature). any suggestions on what to do with 150MB since it is so small (mb). windows 7.
sincerely takoda