Hard drive size reported wrongly.

Last night I used Steganos 4.15 to clean up my cache (temp internet
files,
etc). Today I discover that my hard drive seems to have shrank by about
3GB.

Checking through the files, it is clear that there are no new files but
Windows Explorer and DOS are saying there is less space than in reality.
They are saying 400MB when there should be about 3.6GB. When I go to
properties in Windows explorer the c:/windows dir gives the inaccurate
figure. On scandisk in DOS when looking at the drive it will jump from
18%
scanned to 72% scanned (so clearly ignoring the files which do not
exist).

I have tried uninstalling Steganos, using scandisk (dos and windows),
etc,
but cannot get the right free space size back. On one occasion scandisk
in
DOS said that the file space was being recorded incorrectly and it would
fix
it, but nothing changed, even though scandisk said it had fixed the
problem.
Running in safe mode also does not help. This is nothing to do with the
windows swap files, temp files, etc.

Any ideas? I am running a Compaq Presario with Windows ME. Compaq
diagnostics reports the wrong hard drive size too.

Thanks!