Windows Media Creation Tool

What the Media Creation Tool is

The Media Creation Tool is a small executable published by Microsoft that downloads current, digitally signed Windows installation files directly from Microsoft's servers. Depending on the option you choose, it either upgrades the PC you're running it on in place, or writes the files to a USB flash drive or ISO file so you can install Windows on another machine.

It exists specifically so that people don't need to hunt for Windows ISOs on third-party sites, many of which are outdated, tampered with, or bundled with unwanted software. Because the tool always pulls a fresh build from Microsoft at the time you run it, the resulting media matches the current release rather than an old snapshot.

Official source only

Only download the Media Creation Tool from Microsoft's own software download pages: microsoft.com/software-download/windows10 for Windows 10, and microsoft.com/software-download/windows11 for Windows 11. Both pages offer the tool itself alongside a direct ISO download option.

PC Utility Hub is an independent site and is not affiliated with, endorsed by, or sponsored by Microsoft. This page is informational only — it is not an official Microsoft download page, and we do not host, mirror, or distribute the tool or any Windows ISO ourselves. Always get the file from a microsoft.com address.

What the tool actually does

• Detects your current edition, language, and architecture (or lets you choose them manually for another PC).
• Downloads the matching Windows image from Microsoft's content delivery servers.
• Verifies the download and either starts an in-place upgrade or writes the files to your chosen media.
• Formats the target USB drive (erasing it) and copies boot files plus the Windows image (as install.wim or install.esd, sometimes split for FAT32 compatibility).

Windows 10 vs Windows 11 tooling

Microsoft ships separate download pages and, in effect, separate tooling for each OS version. The classic Media Creation Tool on the Windows 10 page builds Windows 10 media only. Windows 11 uses two different official tools depending on what you want: the Windows 11 Installation Assistant for an in-place upgrade on the current PC, and a 'Create Windows 11 Installation Media' tool (also referred to informally as the Windows 11 Media Creation Tool) for building a bootable USB drive or ISO for another PC. Both live on the Windows 11 software download page.

The key practical difference is enforcement: Windows 11 setup checks for TPM 2.0, Secure Boot, and a supported CPU, and can block installation on hardware that doesn't meet those requirements, whereas Windows 10 media has no such gate.

Creating installation media (USB or ISO)

The workflow is the same shape on both OS versions: download the tool from the correct Microsoft page, run it, and choose 'Create installation media for another PC' rather than the upgrade option.

1. 1Go to microsoft.com/software-download/windows10 or /windows11 depending on which OS you need.
2. 2Download the tool (or, on the Windows 11 page, the Create Windows 11 Installation Media tool) and run the executable.
3. 3Accept the license terms.
4. 4Choose 'Create installation media for another PC' (not 'Upgrade this PC now').
5. 5Pick language, edition, and architecture, or leave the recommended options checked to match your current PC.
6. 6Select USB flash drive or ISO file as the media type.

Bootable USB creation, step by step

If you chose USB flash drive in the previous step, the tool handles formatting and file copying automatically.

1. 1Insert a USB flash drive of at least 8 GB (16 GB+ recommended) into the PC.
2. 2Select the drive from the list shown by the tool — double-check you've picked the right one.
3. 3Click Next and let the tool download the Windows files; this can take a while depending on connection speed.
4. 4Wait for the tool to format the drive and copy the installation files; do not remove the drive during this step.
5. 5Click Finish once complete, then safely eject the drive.
6. 6Boot the target PC from the drive via its boot menu or UEFI firmware boot-order settings.

Creating an ISO instead

Choosing ISO file instead of USB flash drive downloads a single .iso file to your computer. You can then burn it to a DVD, mount it directly in Windows (double-click to mount as a virtual drive), or feed it into a separate USB-writing tool such as Rufus if you want more control over partition scheme (GPT/MBR) or want to adjust Windows 11 setup requirement checks.

Both the Windows 10 and Windows 11 download pages also expose a direct 'Download Windows Disk Image (ISO)' option, letting you skip the Media Creation Tool entirely if you already know you want the ISO.

System requirements

To run the tool itself you need a working internet connection, enough free disk space for the downloaded image (roughly 8 GB free is a safe minimum), and a USB port or DVD burner if creating physical media. Installing Windows 11 additionally requires the target PC to meet Microsoft's Windows 11 hardware requirements — TPM 2.0, UEFI with Secure Boot capability, at least 4 GB RAM, 64 GB storage, and a supported 64-bit CPU.

Preparing the USB drive

The tool formats the drive for you, but a few things matter if you're troubleshooting or preparing it manually beforehand: capacity, file system, and existing data.

Common errors and troubleshooting

• Error 0x80042405-0xA001A — usually a download or disk-write failure; free up disk space, disable third-party antivirus/VPN temporarily, and retry, ideally on a wired connection.
• 'We're not sure what happened, but we're unable to run this tool on your PC' — often caused by a corrupted download; delete the downloaded file, clear temp files, and download the tool again from the official page.
• Dynamic update failures during setup — the tool tries to fetch update packages during install; if this repeatedly fails, rerun the tool and, if available, choose an option to skip dynamic updates, or check your network connection.
• 'There's not enough space on this PC' or on the USB drive — free up at least 8–10 GB, or use a larger USB drive; the process needs room for the downloaded image plus temporary files.
• USB drive not recognized as bootable — reformat as FAT32 and confirm the target PC's firmware boot mode (UEFI vs Legacy) matches the drive's partition scheme; see the bootable USB guide below for a full walkthrough.
• Tool hangs at 'Downloading Windows...' — usually network/proxy interference; try a different network, disable VPN, or retry later since Microsoft's servers can be under heavy load right after a new release.

Safe download checklist

• Type or search for microsoft.com directly rather than clicking ad links.
• Confirm the URL starts with https://www.microsoft.com/software-download/ before downloading anything.
• Check the file name matches what Microsoft's page describes (e.g. MediaCreationTool*.exe) and that the download comes from a microsoft.com domain, not a redirect to a third-party host.
• Avoid sites offering 'faster' or 'pre-activated' Windows ISOs — these are not official and can carry malware.

After creating media

If Windows won't start after installing from your new media, boot from the same USB/ISO again and choose Repair your computer to reach the WinRE recovery environment, or run System File Checker and CHKDSK once you're back in Windows to check for corruption.