If you are already on Windows 11, this is the easiest method. Microsoft rolls updates out in phases, meaning you might not see it immediately.
Once you download an ISO, verify it against Microsoft’s published hash to ensure it’s genuine. Example (actual hash for 23H2 English x64 – ): download windows 11 23h2
Before you hit that download button, ensure your hardware is compatible. The requirements for 23H2 are the same as the original Windows 11 launch: If you are already on Windows 11, this is the easiest method