From the main Rufus window, choose the relevant USB under ‘Device’.Make sure it has at least 8GB free and all other files have been removed Insert the USB which the ISO file will be mounted on.Latest version of Rufus (3.15 at the time of writing) to the device where Windows 11 has also been downloaded Once installed, this will run Windows 11 as if you’ve just got the device out of the box. If you need to keep any of your existing files and data, make sure you select this option. Follow the step-by-step guide to download the ISO file.The Media Creation Tool will now download.Under ‘Create Windows 11 installation media’, click ‘Download Now’.Previously, the download process involved signing into a Microsoft account and registering for the Windows Insider Program. You can then choose what you want back on your PC at a later date. If there are files you don’t need immediately, it’s worth backing them up and then performing a factory reset. Our guide to freeing up space in Windows 10 could be useful.

The Windows 11 ISO file is 5.1GB in size, so you’ll need that spare capacity on the device where it’s being downloaded, any flash drives you’re using and the target devices. Before proceeding, it’s worth making sure you won’t run out of space at any stage.

Windows 11 download tool