Cannot find 230 Gb <unknown> files

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My C Drive is 288 Gb and has 15 Gb of known files, 23 Gb free and 230 Gb of
what WinDirStat lists as <unknown> files.

My setup is:
HP m8150n with Intel Viiv Intel Core2 Quad Processor Q6600 (2.4 GHz)
Windows Vista Ultimate
3 Gb PC2-5300 DDR2 SDRAM
NVIDIAGeForce 8400 SEgraphics
640 Gb 7200RPM SATA HD
C Drive 288 Gb
D Drive Restore 9 Gb with 8 Gb full; 1 Gb free
E Drive 298 Gb

Several days ago I received message that C Drive is full. I checked and it
had 287.5 Gb full with 500 Mb free. I moved Pictures, Video & Music to my E
Drive and now have 23 Gb free.

When I check each folder, the total of all is 15 Gb. The C Drive shows 23
Gb free. Nothing else shows up in folders, definitely not the 230 Gb of
unknown files.

I ran Disk Cleanup, Defrag, went to Comd Prompt & ran chkdsk /f c:; went to
Organize/Folder/View and checked "Show hidden files" & unchecked "Hide
extensions" & "Hide protected OS".

Set Restore Points at 2 Gb max.

Ran Disk Cleanup again and ran WinDirStat. I still have 230 Gb listed as
<unknown>.

I cannot see them on my C Drive, so I don't know what kind of files they
are. This group only shows up in WinDirStat, but obviously they are taken up
because I only have 23 Gb free.

Any ideas on how I can "view" these unknown files so I can determine if and
how I can delete them? Any programs out there, other than WinDirStat, that
might help me identify them?

--
Ralph IB
Don''''t take life too seriously; you''''re not going to get out of it alive
anyway.
.

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