The cumulative update for Windows 10 version 22H2 for x64-based systems is an update that includes security and quality improvements for Windows 10. The update is identified as KB5031356 and was released on October 2023. The update is part of the final rollout phase and is designated for broad deployment. The update is not a feature update, but rather a regular update that includes bug fixes, security patches, and other improvements. The update cannot be skipped as it is important for the security and stability of the system. The size of the update is not mentioned in the search results.