How can I restore some registry keys and system files that I mistakenly deleted?

[Windows Central Question]

I have windows 10 home single language genuine OS after upgrade

I have windows 10 home single language genuine OS after upgrade. I have bymistakely deleted some of the registry keys and system files. I have tried to restore at some point but still my Laptop is not working properly. I want to instal Windows 10 again so plzz tell me some method so that I will not loose the genuine OS of my system and could reinstall WIndows . i dont have the product key package
Plzz help me to reinstall Windows 10 same version and not to lose the genuine one

 

[Dietrich Cleijne]

Re: I have windows 10 home single language genuine OS after upgrade

System recovery.

Recovery options in Windows 10 - Windows Help