Software tower · floor

Windows 11 media creation tool, and the key you may have

Microsoft describes what this makes in one line, and it is worth reading before deciding you need it: installation media “can be used to install a new copy of Windows, perform a clean installation of Windows, or reinstall Windows”.

That is genuinely all there is to obtaining it. The tool is the download — there is no separate program to install first, and Microsoft’s own description of what happens next is simply that it “walks through” the job. The interesting part is not the steps but what has to be ready before them.

The second requirement carries the first warning of the page, and Microsoft puts it inside a recommendation rather than in a box of its own.

The third requirement is the one that sends people looking for things they may not need — and Microsoft answers it in a sentence that is not widely repeated.

Between that and the exception in the requirement itself — “not required for digital licenses” — the practical position is that a great deal of the anxiety about product keys is misplaced on a machine that came with Windows already on it. The key is either in the firmware or attached to the account, and in neither case is there a number to find. Microsoft keeps a separate page for the cases where there is.

The same tool for Windows 10, with one small difference. Microsoft publishes the identical route on the Download Windows 10 site — and notes something worth knowing if the downloaded file looks unfamiliar: “The .exe may have the version appended, such as MediaCreationTool_22H2.exe.” It also states the position plainly on the same page: support for Windows 10 “has ended on October 14, 2025”, after which there are no free updates, technical assistance or security fixes — “your PC will still work, but we recommend moving to Windows 11”.

One more distinction is worth making because it decides whether you need a USB stick at all. An ISO is the same installer as a file rather than on a drive. Microsoft names two uses for it: inside virtual machines, where “a USB flash drive isn’t required”, and for burning the media onto a DVD. So the choice between USB and ISO is a question about what will read it, not about which is better.

What this page will not do is walk you through installing Windows. That is the step after this one, it varies with what you are installing over, and Microsoft keeps its own recovery and installation pages for it. What this floor covers is the preparation — which is where the erasable drive and the possibly-unnecessary key both live.

Nor will it tell you whether your machine can run Windows 11. That is a separate published list of requirements, and it is the thing to check before making media for an upgrade rather than after.

The floors below take it three ways: making the media, what a reinstall costs you, and the question of whether the machine qualifies in the first place.

What this tower will not do

It will not tell you to find a product key before starting. Microsoft says many modern devices hold it in firmware and apply it automatically, and that digital licences need none.

It will not treat the USB drive as reusable storage during the process. Microsoft says any content on it is deleted, and that is the whole of the warning.

And it will not walk you through the installation itself. That is a separate job with separate documentation, and what this floor covers is everything before it. What holds instead is simple: the description of what installation media is used for, the three steps for downloading and running MediaCreationTool.exe, the three requirements of a reliable internet connection, a blank USB flash drive of at least 8 GB whose contents are deleted, and a 25-character product key not required for digital licences, the note that many modern devices hold the key in firmware and apply it automatically when it matches the version and edition, the instruction to back up files before installing or reinstalling, the ISO alternative for virtual machines and DVDs, the appended version in the Windows 10 filename, and the statement that Windows 10 support ended on 14 October 2025 are quoted from Microsoft’s support documentation, listed below.