One of the OS I frequently use is Windows 7. Unfortunately I recently ran out of partition space (partition D:, which has total size 668GB). I uninstalled some big, unused applications. However I still only have 1.92GB free out of 668GB total.
It's easy to estimate that the total sum of the programs in the Add/Remove Programs section is even less than 300GB.
When I selected all folders and files on the D: partition and clicked Properties I saw this:
The total size of files on this partition is 131GB.
Something is wrong. What's wrong and why?
PS. I have unchecked in Windows' options hiding system's folders.