How to hide toolbar in explorer?

Question

Windows

A year ago, when I installed Windows 7, I hid the menu bar in Explorer.
Now I accidentally pressed some combination of keys and it reappeared:

Actually, how to remove it? I can’t work right now - like a red rag for a bull.
It should be:

Answer 1

Try this article forum.oszone.net/post-1416204-1071.html
It's for Vista, but the topics are similar. In short, hiding using the settings will not work, you need to change the styles of a particular theme. It is logical, there is help on the panel, and it should be visible.
I tried, I found all the files, but in the Resourse Tuner program, which I used to edit the library, the search does not work and I scored, but it should work.
upd .: I confirm, I made a hiding, for myself I chose the option with auto-hide, but you can just hide it. If you can't figure it out yourself - write, I'll tell you.