Hate Windows 10

I purchased Lenovo laptop about 6 months ago, it has W10 loaded.

 

My question for any computer guru's out there is: Can I downgrade W10 to an ealier Windows if the lap top came with W10 at time of purchase?

 

If so, how to go about it in words a 5 year old would understand please..........

 

Thanks in advance

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Map out your future, But do it in pencil, The road ahead is as long as you make it.
Make it worth the trip.
Jon Bon Jovi