Microsoft’s official free upgrade offer to Windows 10 ended in 2016, but the activation servers remain open. If you have a genuine Windows 7 Pro or Windows 8.1 Pro license key:
: Microsoft allows users to run Windows 10 without activation indefinitely. You will have a small watermark and lose some personalization settings (like changing your wallpaper easily), but your system remains secure and stable. removewat+windows+10+pro+verified
Legal and ethical considerations