The SHA256 hash for the official Win10_21H2_English_圆4.(it says it's an insider build ISO, but it's the same as the 21H2 release build, as Microsoft releases the releases first to the insiders).Their WayBack Machine (where you can see it's the original link) (even slower).The Internet Archive (but slow download speeds).Microsoft lets you download Windows 10 from a non-Microsoft device like Apple or even Linux. They offer a media creation tool that downloads the files and creates bootable media. UUP dump lets you download Unified Update Platform files, like Windows Insider updates, directly from Windows Update. The website does not directly offer ISO to existing Windows users. Update Stack Package - (Version 1301.2310.10011.0) arm64. You can try getting the ISO from one of the following: Download Windows 10 ISO (62 or 32-bit) through the Official Microsoft site.
The best way to download now an ISO for Windows 10 21H2 would be to find somewhere online that has the ISO to download (there are links for it all over) and once downloaded verify the file hash that it's indeed the untouched ISO of Windows 10 21H2. Since Microsoft recently decided to remove their official download links for past versions of Windows, Rufus also doesn't have them anymore. Rufus doesn't have their own hosting for those ISO downloads, they always pull it from the official releases download links.
