Diagnostics said the HD failed the tests on the computer. Disk Minder reported an error, but failed to identify it. After carefully checking each option the following message appeared. Choosing options of Auto Fix and Partition Tables warned of dire consequences if the partition tables changed. Sigh, guess I'll just let that 237 KB remain unassigned.
Rescue disk creates a floppy boot disk.
Included in the latest update is an unformat command. Clean and Optimize Cleanup Wizard found many unnecessary files. Activating Shredder removed them permanently. Disk Tune took only 20 minutes to defrag and consolidate the free space on my hard drive. While working, it gives information on how many Kb are left to be moved, as well as percentage of completion and how long it's been working.