It should now start downloading Windows 8.1. Step 6: Run the file and it should say “Download is interrupted”. Step 5: Go to this page again and, now, click on the “Install Windows 8.1” button. Cancel the download immediately by clicking the X button on the upper right of the setup Window. Step 3: It will show you the version of Windows that is to be downloaded. Step 2: Run the file and enter in your retail Windows 8.0 product key. Step 1: Go page and click on the “Install Windows 8” button. Folks, we have some GREAT news for you! A Microsoft community member have figured out a loophole that lets you download Windows 8.1 using your Windows 8.0 product key! The community member’s name is Tom.
