> 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/foundry-osd/adk.md).

# Windows ADK and Windows PE

Foundry OSD requires Windows ADK and Windows PE Add-on version `10.1.26100.2454` to build deployment media.

## What Foundry checks

The ADK page detects:

* Whether the Windows ADK is installed.
* Whether the Windows PE Add-on is installed.
* The installed ADK component version.
* Whether the detected ADK build satisfies the current compatibility check.

<figure><img src="/files/KaHYGMiZAguruIeaN4D5" alt="Foundry OSD showing missing Windows ADK and Windows PE Add-on components"><figcaption><p>Foundry identifies each required component that is not ready.</p></figcaption></figure>

## Install missing components

1. Open **ADK** in Foundry OSD.
2. Review the detected status and version information.
3. Select the ADK setup action.
4. Approve elevation when Windows requests administrator permission.
5. Keep Foundry OSD open while the installer is downloaded and executed.
6. Wait for Foundry to refresh the component status.

<figure><img src="/files/Ybp73ZfHHtNoHscjcLHh" alt="Foundry OSD automatic Windows ADK and Windows PE Add-on installation action"><figcaption><p>Install the supported ADK and Windows PE Add-on directly from Foundry OSD.</p></figcaption></figure>

{% hint style="info" %}
The automatic installation downloads and installs Windows ADK `10.1.26100.2454` first, followed by Windows PE Add-on `10.1.26100.2454`.
{% endhint %}

## When the page reports ready

Continue to [general configuration](/foundry-osd/general.md). WinPE language and media creation options remain blocked until the required components are ready.

## Installation does not complete

* Confirm that Foundry OSD is running with administrator permissions.
* Confirm Internet access and proxy policy.
* Close another ADK installer that may already be running.
* Retry the action after Windows Installer completes any pending operation.
* Review [media creation troubleshooting](/troubleshooting/media-creation.md) if detection remains incorrect after installation.


---

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