Safe place to download Windows 11 26H1 ISO image?

The only legitimate way to get a newer build like 26H1 without enrolling your PC in the Insider Program is via UUP Dump. This is a community-run website that uses Microsoft's own public file servers. Instead of giving you a pre-made ISO (which could be modified), UUP Dump generates a script for you. This script downloads the individual update files directly from Microsoft's servers and assembles them into an ISO on your own computer. This ensures the files are authentic.

Step-by-Step Guide to Using UUP Dump for downloading Windows 11 26H1 ISO

Step 1: Access UUP Dump
Step 2: Find the 26H1 Build

• On the main page, select "Windows 11" under "Choose the ring and version."
• You will see a list of available builds, typically labeled with terms like "Dev," "Canary," or "rs_prerelease."
• These are the 26H1 builds. Avoid any labeled "Beta" or "Release Preview" if you specifically want the newest features.
• Click on the most recent build number you see.

Step 3: Choose Your Edition and Language

• On the next page, select your language (e.g., English (United States)).
• Choose the Windows edition. For most users, "Windows 11" is the correct choice as it includes Pro and
• Home during installation.
• Click "Next".

Step 4: Choose Download Method

• You will now see download options. Select "Download and convert to ISO" (this is the easiest method).
• Under "Conversion options," select "Include updates" to get the latest cumulative update integrated.
• Click "Create download package".

Step 5: Run the Script

• A ZIP file will be downloaded. Extract its contents to a new folder on your desktop.
• Inside the folder, run the uup_download_windows.cmd file as Administrator (Right-click > Run as administrator).
• The script will now run. It will download files directly from Microsoft and then build your ISO. This process can take 30-60 minutes depending on your internet speed. The script will close automatically when finished.