I wanna restore windows 10 back

https://insider.windows.com/en-us/leave-program
Hello
please read this article

Hello Wael_Alaa,

 

You can make clean install of Windows 10, refer this step-by-step guide:

 

https://www.kapilarya.com/how-to-make-clean-install-of-windows-10

 

Let us know if this helps!

 

Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.