If you are looking for specific, bleeding-edge versions (like the latest 25H2 or 26H1 builds), you can use the UUP Dump website. This tool fetches files directly from Microsoft’s update servers and compiles them into a fresh ISO for you. 2. The "Lite" Treatment: Debloating Your ISO

The most common reason to build a custom ISO is to remove "bloatware"—the extra apps and background processes that slow down your system.

Here is your complete guide to crafting a personalized Windows 11 image, from official downloads to advanced debloating. 1. Grab Your Base Image