Yes you can still download 10 for free
I got mine via my account from the Microsoft site
What OS are you on at present
Read this link through it will help you
Once you have the ISO, you can use ImgBurn to burn it to a DVD or Rufus to burn it to a USB ThumbDrive, either of which you can use to perform an in-place upgrade to a previously qualifying version of Windows, by simply double clicking the setup.exe application from within the Windows 7 SP1 or Windows 8.1 w/update Operating System.
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