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237 GB partition 99% full, but all visible files only take up 48 GB.
I haven’t seen this issue before.
A 238 GB SSD drive has a single C: partition taking up 237 GB, and Windows 8 Disk Management reports 1.44 GB or 1% free space.

I have unchecked ‘Hide protected operating system files (Recommended)’ in Folder Options in order to be able to see as much file content as possible.

However, selecting all files in C:\ and getting file properties reports only 48.4 GB

WinDirStat sees partition C: is 237 GB and only has 1.4 GB free:

However WinDirStat reports only 46.3 GB disk usage.

I have gone through C:\Users\ looking for other accounts with hidden content and taken ownership of Administrator to check for other files, but still see no space hogs.
Can anyone suggest any reason why the hard disk partition is so full, and has 187 GB unaccounted for?

