> For the complete documentation index, see [llms.txt](https://docs.foundryosd.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.foundryosd.com/troubleshooting/media-creation.md).

# Media creation

## ADK or Windows PE remains unavailable

**Evidence to collect**

* Detected ADK version.
* Detected Windows PE Add-on status.
* Installer result shown by Foundry OSD.
* Whether Foundry is running as administrator.

**Actions**

1. Confirm Internet access and administrative permissions.
2. Complete any other Windows Installer operation.
3. Install Windows ADK `10.1.26100.2454` before Windows PE Add-on `10.1.26100.2454`.
4. Restart Foundry OSD and refresh detection.

## Readiness remains blocked

Open each reported readiness group and correct the specific missing or invalid value. Common blockers include output paths, Windows PE language, architecture, boot-image source, USB target, runtime configuration, secrets, and incompatible customization.

## ISO creation fails

* Confirm free space in both the temporary workspace and output location.
* Confirm the output file is not open or locked.
* Confirm security software has not quarantined a required deployment tool.
* Record the failed operation before retrying.

## USB creation fails

{% hint style="danger" %}
Creating USB media formats and erases the selected disk. Reconfirm the target before every retry.
{% endhint %}

* Verify that the drive is still connected and writable.
* Close applications using the drive.
* Confirm that the selected layout supports the target firmware.
* Do not retry against a different disk until its identity is verified.


---

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