How to Find and Download a Specific Windows Build on UUP dump

Updated

UUP dump lets you download Unified Update Platform files for Windows directly from Windows Update servers. To find a specific build, start from the home page: use the Quick options to pick a release type and architecture, browse the Recently added builds table for the newest additions, or open the Add a new build page if the build you want isn't listed. Note that what you download are UUP files, not a finished ISO — you'll typically need an additional tool to convert them.

Start with the Quick options on the home page

The home page groups builds into release-type shortcuts, each offered for x64 and arm64. Pick the row that matches how stable a build you want:

Quick option What it gives you Best for
Latest Public Release build Latest updated build for regular users Everyday use
Latest Release Preview build Reliable builds for previewing the next release Trying upcoming releases
Latest Beta Channel build Reliable builds with most upcoming features Early adopters
Latest Experimental Channel build Somewhat unreliable builds with new ideas and long lead features Enthusiasts
Latest Future Platforms build Somewhat unstable builds with latest platform changes and early features Highly technical users

Choose the architecture (x64 or arm64) in the same row, then continue to the build's download page.

Browse the full platform and version list

Below the quick options, the site lists platforms and versions you can drill into:

  • Windows 11 — 26H2 (Experimental), 26H2, 26H1, 25H2 (Beta), 25H2, 24H2 (Beta), 24H2, 23H2, 22H2, 21H2
  • Windows Server — 24H2, 23H2, 22H2, 21H2
  • Windows 10 — 22H2, 21H2, 1809

Select the platform and version, then the specific build and architecture you need.

Check Recently added builds for the newest files

The Recently added builds table shows what was most recently added, with build name, architecture, and the date added (UTC). Examples from the page include:

  • Windows 11, version 22H2 (22621.1778) — amd64, x64
  • Cumulative Update for Windows 10 Version 21H2 (19044.7727) — amd64, x64
  • Windows 11 Insider Preview Feature Update (26220.9568) — arm64 and amd64
  • Preview Update for Windows 11 (26200.9550) — amd64

This is the fastest way to confirm a build exists on the site and to see which architectures are available for it.

Use "Add a new build" when a build isn't listed

If you can't find the build through the quick options or the version lists, the home page points you to the Add a new build page. Use it to locate builds that aren't directly listed.

What you get, and what to expect next

UUP dump provides UUP files pulled from Windows Update servers — it does not hand you a ready-made ISO. After downloading, you'll generally need an extra tool to convert those files into an installable ISO. Plan for that step before you start, and make sure you have enough disk space for both the UUP files and the resulting image.

Quick checklist

  1. Decide the release type you want (public, release preview, beta, experimental, or future platforms).
  2. Pick your architecture: x64 or arm64.
  3. If you need a specific version, use the Windows 11 / Server / Windows 10 lists instead of the quick options.
  4. Confirm the build and architecture in Recently added builds, or use Add a new build if it's missing.
  5. Download the UUP files, then convert them to an ISO with a separate tool.

UUP dump states it is not affiliated with Microsoft, so treat it as a third-party source for Windows Update files.