Is it possible to revert back to windows 7 from windows 10 on Lenovo Z580?

I have the Lenovo Z580, and recently upgraded it to windows 10. But it's total crap and it caused many of my apps to not function as it use to. I'm wanting to revert back to windows 7. How can I do that?
One key recovery does not work.

Under settings there should be an option I'm sorry I already reverted back so I don't remember how I did it.

Going backwards is not normally a good idea.
Percentage wise, more people are having issues going back than are having issues with Windows 10.