Possible Duplicate:
How can I visualize the file system usage on Windows?
I highlighted all files and folders in my C drive (with "show hidden files or folders" switched on) in Windows 7 Professional x64, and went on right click > "Properties", where I found out that the total size is 73.3 GB.
However, in the "My Computer" screen it's telling me that I have 12.5 GB free of 111 GB which means that I have 25.2 GB Unaccounted for.
Any ideas why? And if it can be solved, how would I do this?