Here are concise, authoritative references and notes to help someone looking for a Windows 11 21H2 64‑bit ISO from Microsoft, and guidance on how to get it safely.

Microsoft — Download Windows 11 21h2 Iso File 64-bit

Here are concise, authoritative references and notes to help someone looking for a Windows 11 21H2 64‑bit ISO from Microsoft, and guidance on how to get it safely.