my machine is dualboot windows and UBUNTU 17 (EFI). before a year I installed Ubuntu as dualboot with windows 10. both OS were working perfectly. I started loving Ubuntu and thought there would be no need of windows in future, so I deleted windows partition from Ubuntu. But now I wanted to UNDO this and to reinstall windows with dualboot environment. Although I deleted Windows partition, In splash screen there is option of windows but now I can't boot into windows. How can I copy necessary files from windows-iso file from DVD to its partition from ubuntu?
How can I UNDO this and how to make both OS working as it was before?
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