If you're building a computer, google "windows 10 oem license" and use that to install with the downloadable iso - https://www.microsoft.com/en-us/software-down

If you're building a computer, google "windows 10 oem license" and use that to install with the downloadable iso - https://www.microsoft.com/en-us/software-download/windows10 https://www.microsoft.com/en-us/software-download/windows10 30 bucks in most stores.. or get licenses through visual studio benefits, schools or transfer from another PC you may be shutting down. It's not rocket science to save money if thats your biggest concern.