Download the .msu file matching your system architecture.
Once finished, you can mount the ISO (double-click) and run setup.exe for an in-place upgrade. Method 2: Direct Offline Installer (Update Assistant – .exe for a single PC) This method downloads a standalone installer that works without an active internet connection after download. windows 10 21h2 update download offline
Run the tool and accept the license terms. Download the
Select a save location. The tool will download the 21H2 ISO (approx. 5–6 GB). or ISO file) for another PC."
Select "Create installation media (USB flash drive, DVD, or ISO file) for another PC."