uupdump.net

UUP dump lets you download Unified Update Platform files directly from Windows Update servers, covering Windows 11, Windows Server, and Windows 10 across several release channels and both x64 and arm64 architectures. If you want a specific Windows build — a public release, a preview, or an experimental future-platform build — you can pick it from the site's quick options or browse the full build list.

Windows versions available

The site organizes downloads by product family and version:

Windows 11 has the widest coverage, including both stable and pre-release branches. Windows Server and Windows 10 are limited to their listed versions.

Build types and release channels

Beyond picking a version, you choose a release type. Each quick option targets a different audience:

• Latest Public Release build — the newest build for regular users.
• Latest Release Preview build — reliable builds for previewing the next release; suited to trying upcoming releases.
• Latest Beta Channel build — reliable builds with most upcoming features; suited to early adopters.
• Latest Experimental Channel build — somewhat unreliable builds with new ideas and long-lead features; suited to enthusiasts.
• Latest Future Platforms build — somewhat unstable builds with the latest platform changes and early features; suited to highly technical users.

The first three are the safer choices for everyday or near-release testing. The last two trade stability for earlier access to platform changes.

Architectures

Each quick option is offered for two architectures:

• x64 (listed as amd64 / x64 in the build list)
• arm64

Pick the one matching your target device. A build entry may appear twice — once per architecture — as seen in the recently added builds list.

Finding a specific build

If the quick options don't match what you need, the site points you to its Add a new build page to search for a particular build. The homepage also shows a Recently added builds table with columns for build name, architecture, and date added, which is useful for spotting the newest uploads.

For example, recent entries included a Windows 11 22H2 cumulative-style build (22621.1778) for x64, a Windows 10 21H2 cumulative update (19044.7727), and multiple Windows 11 Insider Preview Feature Updates (such as 26220.9568 and 28020.3112) in both arm64 and x64.

Choosing between them

• Want a stable, current install? Use Latest Public Release build.
• Want to preview the next release with reasonable reliability? Use Release Preview or Beta Channel.
• Want the newest features and accept instability? Use Experimental Channel or Future Platforms.
• Need a specific version or an older build? Browse the version list or use Add a new build.

UUP dump is not affiliated with Microsoft; it retrieves files from Windows Update servers. Availability depends on what those servers currently offer, so older or niche builds may not always be present.

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:

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.

Unified Update Platform (UUP) files are the update packages Microsoft distributes through Windows Update. UUP dump is a third-party site that lets you download those same files directly from Microsoft's Windows Update servers, without waiting for your PC to receive the update through normal channels. You would use it if you want to grab a specific Windows build or update manually — for example, to build an ISO, test an Insider build, or get an update on a machine that isn't being offered it yet.

What UUP files actually are

UUP is Microsoft's delivery format for Windows updates. Instead of shipping one large patch, Windows Update delivers a set of component packages that the system assembles into the final update on your device. That's why UUP content is a collection of files rather than a single installer.

UUP dump's own description states it "lets you download Unified Update Platform files, like Windows Insider updates, directly from Windows Update." The files originate from Microsoft's servers — UUP dump provides a way to request and package them, not a separate copy of Windows.

Why people download from UUP dump

• Get a build your PC isn't offered yet. You can pull a specific build or update without waiting for it to roll out to your device.
• Build an ISO. UUP files can be converted into an installable image, useful for clean installs or virtual machines.
• Test Insider and preview builds. The site lists Release Preview, Beta, Experimental, and Future Platforms builds, which map to different stability levels.
• Access older or specific releases. The catalog covers multiple Windows versions and architectures, so you can target an exact build.

What you can download

The site organizes builds by Windows version and channel. From the page evidence, the available families include:

Quick options let you jump to the latest build in a given channel:

• Latest Public Release build — the regular-user release.
• Latest Release Preview build — for previewing the next release.
• Latest Beta Channel build — most upcoming features, for early adopters.
• Latest Experimental Channel build — less reliable, for enthusiasts.
• Latest Future Platforms build — least stable, for highly technical users.

Each option is offered for x64 and arm64. If the build you want isn't listed, the site points to an "Add a new build" page.

Choosing the right channel

Pick based on how much instability you're willing to accept:

• Public Release — you want a normal, supported build.
• Release Preview — you want the next release early but still relatively reliable.
• Beta — you want upcoming features and accept some rough edges.
• Experimental / Future Platforms — you're a technical user testing early platform changes and accept that builds may be unreliable.

Match the architecture to your target machine: x64 for most Intel/AMD PCs, arm64 for ARM devices.

Practical notes

• UUP dump is not affiliated with Microsoft, as stated on the page.
• The files come from Windows Update servers, so you're downloading Microsoft's own update content — UUP dump is the access and packaging layer.
• Builds are added continuously; the "Recently added builds" list shows entries with timestamps, so the catalog changes over time.

If your goal is simply to update a normal PC, Windows Update is the straightforward path. UUP dump is for when you need a specific build, an ISO, or an update your device isn't being offered.

UUP dump is a website that lets you download Unified Update Platform (UUP) files — including Windows Insider updates — directly from Windows Update servers. It is aimed at people who want the raw update files rather than waiting for an update to arrive through Windows Update, or who need a specific build for a clean install, a virtual machine, or offline use. The site states plainly that it is not affiliated with Microsoft, so it is an independent front end to Microsoft's own update delivery infrastructure, not an official Microsoft service.

What you can get from it

The site organizes downloads around Windows releases and channels rather than around a single "download" button. From the homepage you pick a platform and a release type, and the site then offers builds matching that choice.

Platforms listed on the site include:

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

For each platform, the site distinguishes between release types:

Builds are offered for x64 and arm64 architectures, and the homepage also lists recently added builds with their architecture and the date they were added — for example, Windows 11 Insider Preview Feature Updates and cumulative updates for Windows 10 versions 21H2 and 22H2.

How the download flow works

The site's own description is the key mechanism: it pulls UUP files from Windows Update servers. In practice this means you select a build, and UUP dump generates a download package for it rather than hosting a finished ISO itself. If the build you want is not listed among the quick options, the site points you to an "Add a new build" page, which is how builds outside the pre-listed set get requested.

The practical consequence is that what you receive is UUP file sets, not necessarily a ready-to-boot ISO. Converting those files into an installable image is a separate step, and it is the part most people underestimate.

Who it is for

UUP dump is useful if you:

• Want a specific Windows build or Insider Preview build that Windows Update is not currently offering you
• Need update files for offline installation or for a machine you are provisioning
• Are testing preview or experimental builds in a VM and want to control exactly which build you start from
• Want to inspect or archive update payloads

It is less suited to someone who just wants the latest stable Windows ISO with no extra steps — for that, Microsoft's own download pages are the more direct route.

Things to know before you start

• Not affiliated with Microsoft. The site says so explicitly, so treat it as a third-party tool that mirrors Microsoft's update content.
• Channel choice matters. Experimental and Future Platforms builds are described by the site itself as somewhat unreliable or unstable. Do not put them on a machine you depend on.
• Architecture matters. Pick x64 or arm64 to match your target device; the wrong choice produces files you cannot use.
• Expect a conversion step. Because the source is UUP files, plan for the extra work of turning them into an installable image.

UUP dump groups its quick options by how stable each build is expected to be, not by Windows version. The Latest Public Release build is the one to pick if you want a normal, supported Windows install; Release Preview and Beta sit in the middle for people who want upcoming features early; Experimental and Future Platforms are for enthusiasts who accept that things may break. All of these pull files from Windows Update servers, so the difference is which update channel the build comes from and how much risk that channel carries.

The quick options and who each one is for

UUP dump's home page lists five quick options, each with x64 and arm64 variants:

The wording in the table is UUP dump's own description of each option, so the risk level is stated by the site rather than inferred.

How the risk actually scales

Reading the five options in order shows a clear progression:

• Public Release — no warning attached. This is the baseline.
• Release Preview — described as "reliable," aimed at previewing the next release.
• Beta — also "reliable," but with "most upcoming features" already present.
• Experimental — "somewhat unreliable," with new ideas and long lead features.
• Future Platforms — "somewhat unstable," with the latest platform changes and early features.

So the split is not Release vs. Beta vs. Experimental as three equal choices. It is a ladder: the further down you go, the more features arrive early and the more the site itself warns about reliability. Release Preview and Beta are both described as reliable; the difference is that Beta carries more upcoming features. Experimental and Future Platforms are the two where UUP dump explicitly flags instability.

Choosing between them

• If this is your main PC and you want it to keep working, choose Latest Public Release build.
• If you want to try the next release but still want something dependable, choose Latest Release Preview build.
• If you want the newest features as soon as they are usable, choose Latest Beta Channel build.
• If you are testing new ideas or long lead features and can reinstall if needed, choose Latest Experimental Channel build.
• If you are a highly technical user tracking platform changes, choose Latest Future Platforms build.

One practical point: these are quick options for the latest build in each channel. If you need a specific older build rather than the newest one in a channel, the quick options will not give it to you — UUP dump points you to its "Add a new build" page for that case.

What you are actually downloading

Every option here downloads Unified Update Platform files from Windows Update servers, which is what UUP dump is for. The channel choice determines which files you get, not the format. The site's recently added builds list shows the same pattern in practice — entries such as "Windows 11 Insider Preview Feature Update" builds alongside "Cumulative Update for Windows 10 Version 22H2" and "Preview Update for Windows 11," each tagged with its architecture (amd64/x64 or arm64) and the date it was added.

UUP dump also states it is not affiliated with Microsoft, so these are files pulled from Microsoft's update servers rather than anything the site produces itself.