It's not in the menu unless you turn it back on.
Here's a google about that.
https://www.google.com/search?q=add+hibernate+to+menu+Windows+10
While we're here, look at what the Windows key now does. Try Win+X and Win+R
Hi all ever since i changed to w10 when i want to power off my computer i cannot click on hibernate as it is none existent unlike all the other w7.
I find this very frustrating as i need to get back to where i left off often.Does anybody know if there is any way of getting this back.
would be glad if anyone can help.
thanks in advance.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic