Windows displays wrong used space data?

Question

So I have a C: partition, and windows says that it has 92.5 GB worth of data in it.

However I've selected every fodler in C: (including hidden folders), and clicked properties to check how much space does it take up, and it is just 57GB.

Now, is Windows displaying wrong information, or may I doing it wrong.

1 Is the properties of C: where it shows how much of the disk is being used

2 Is the properties of all the files in C:

Answer 1

I think the remaining ~35G is occupied by System Restore Have you had this option turned on? (It was ON by default I believe)

Answer 2

If you right-click the C: drive and click properties, Windows is actually showing accurate information.

If you select all files in the C: drive, you actually don't. If you want to see all files in the C: drive, press Windows key + R, type in cmd then cd C: and finally dir /a. You will see all files and directories with their size.