How to use UUP Dump to download Windows 11 build 26100 or any ISO file

If you’re looking to download the latest Windows 11 build—like build 26100—or any other Insider preview ISO, you might notice Microsoft doesn’t always release official ISO files right away. That’s where UUP Dump comes in. This free online tool lets you easily generate Windows ISOs straight from Microsoft’s servers.

Here’s how you can use UUP Dump to get your ISO file quickly and safely.

What is UUP Dump?

UUP Dump is a community-powered website that lets you download Windows updates directly from Microsoft. It creates scripts you run on your computer to fetch the files and assemble a clean ISO image. No shady downloads—everything comes from Microsoft’s own servers.

Why Use UUP Dump?

Get the latest Windows builds before official ISOs are released
Download any edition (Home, Pro, etc.) and language you want
Create ISOs for clean installs or in-place upgrades

Step-by-Step: Download Windows 11 Build 26100 ISO with UUP Dump

1. Visit UUP Dump

Go to uupdump.net.

2. Search for Your Build

Type “26100” (or your desired build number) in the search box and hit enter. Find the correct build for your system (x64 is for most PCs).

3. Select Your Edition and Language

Click the build you want.
Choose your language (like English).
Pick the edition(s) you need (Pro, Home, etc.).
Click Next.

4. Download the UUP Pack

On the next page, select Download and convert to ISO.
Click Download package.
This downloads a small zip file containing scripts.

5. Run the Script on Your PC

Extract the downloaded zip file.
Run the uup_download_windows.cmd file (double-click it).
(If Windows asks for permission, click “Run anyway.”)

The script will open a Command Prompt window. It’ll download all the files from Microsoft, assemble them, and create an ISO in the same folder.

6. Find Your ISO

When the script finishes, look for the new .iso file in your folder. You can now use this ISO to install or upgrade Windows, or create a bootable USB with a tool like Rufus.

Is UUP Dump Safe?

Yes. UUP Dump just helps you fetch files directly from Microsoft. Always download from the official UUP Dump site.

Tips and Troubleshooting

Use a reliable internet connection. The script downloads several gigabytes.
Run as Administrator if you get permission errors.
Antivirus may flag the script, but this is usually a false alarm.
Make sure you have enough disk space (at least 10GB free).

Final Thoughts

UUP Dump is the easiest way to get the latest Windows ISOs—even those Microsoft hasn’t released publicly. Whether you’re a tester, a power user, or just curious, UUP Dump puts the newest builds in your hands fast and safely.

Have questions or need help with the process? Drop them in the comments below!

Keywords: Windows 11 ISO, UUP Dump, Windows Insider Preview, Download Windows 11 26100, Create Windows ISO

Mark Vincent

Tech enthusiast and content creator passionate about making technology simple for everyone. I share practical tips, guides, and reviews on the latest in computers, software, and gadgets. Let’s explore the digital world together!