To free up an extra 1.7Gb of storage space I created a set of Master CDs from the backup data on my hard disk. Although the Master CDs were created succesfully the free space failed to appear in the form of a virtual hard disk assigned the letter "D" as described in the user's guide. I was therefore advised to reformat the hard drive and reinstall my software from the Master CDs. After all this my hard disk properties show a capacity of 37.2 Gb for a 40Gb hard drive. I understand that formatting accounts for some of the missing space, but is it possible that a portion of my hard drive remains hidden?