windows 8.1 #a11y

abdulah aga

I have windows 8.1 my computer is all in ones desktap, it was upgrate to windows 10 afte all, I do have to format har drive and install windows 8.1. I wonder do eny one know how I can find orginal serial number from windows 8.1. I can't find on laber on my computer because looks like don't have seriale number on laber. if some one know pleace help. thenks