Select the language, architecture, and edition of Windows you prefer. Select Create Installation Media (USB Flash Drive, DVD, or ISO File) For Another PC, as shown above, and then click Next. You must then confirm whether you want to upgrade your current PC or create installation media for another PC. A terms-of-use screen will pop up, and you’ll need to then click Accept. Once downloaded, this ISO download tool makes it easy to turn any USB key into a bootable Windows 10 installer and allows you to download the Windows 10 ISO file for future use. This will download the file to your computer. Next, a dialog box will ask you if you want to save a program called MediaCreationTool21H1.exe. Under the header that says Create Windows 10 Installation Media, select the Download Tool Now button. To get started, head to the Windows 10 download page. Step 1: Download the Windows 10 ISO legally from Microsoft on Windows screenshot Keep reading to learn what you need to do. If you don’t know how to download and install a Windows 10 ISO file, we cover the basics. Downloading and installing the Windows 10 ISO file allows you to install the latest Microsoft OS. Whether you currently use Windows 10 and want the latest version or you want to switch from another operating system, it’s possible to do so - but there may be some confusing steps.