strange Defrag behavior

[Guest]

My 30GB NTFS harddisk needs defragmentation badly. Free space is reported as
54 percent.
Starting deframentation, Defrag informs me that there is only -0- percent
available for use.
It then suggests to offload some files to make room. Since this is a systems
disk ( C:\ ) and contains mostly Programs, I have no clue what to unload.
What is causing the discrepancy between -free space- and -space- Defrag can
use
and how can this situation be corrected?
Thank you
Eric vBo

 

[John7]

Run disk check (fix file system errors and scan for bad sectors) first
to have discrepancy fixed between usage and free space.

HTH,
John7

 

[Guest]

Thanks John,
I ran chkdsk C: /V /F, which was executed upon reboot. I saw a message at
the completion about on adjustment being made to the file table, but could
not read the entire message before it disappeared.
Anyway, Defrag still shows -0- freespace, so nothing was fixed.
Any ideas?
Thanks
Eric