Instead of risky third-party archives, you should use official Microsoft methods to get the safely and for free. Official & Safe Ways to Get Windows 10 21H1
Also available on the official Microsoft Software Download page, this tool can "force" the upgrade if Windows Update is not showing it. Why Avoid ".rar" Windows Updates? Download Windows10Upgrade 21H1 rar
: Improved Windows Defender Application Guard opening times. WMI Service : Optimized for remote work scenarios. Instead of risky third-party archives, you should use
Run the tool and select to update directly, or create a bootable USB/ISO for a clean installation. Windows 10 Update Assistant : Instead of risky third-party archives
The 21H1 release was a focused "scoped" update primarily improving: