Scroll down the page to the Select edition, and then select Windows 8.1 version that you’d like to download from the drop-down menu and click on Confirm. Click here to open the official web page of the Windows 8.1 ISO file. The simplest way is to get the Windows 8.1 free download directly from Microsoft. If you have confirmed the Windows 8.1 download operation, you can proceed with the guide below. Here is a list of devices that cannot work with Windows 8.1: It’s known that Windows 8.1 system is not compatible with certain devices especially those who have Intel’s Atom processors. Tip: If you want to know additional system requirements to use certain features, you can refer to this post.