Windows 11 Moment 4 Update Overview Windows 11 Moment 4 update (cumulative update KB5030310, OS Build 22621.2361). Microsoft has released the next major feature update for Windows 11. It was developed under the project name “Moment 4” and introduces several interesting innovations and improvements. Various bug fixes, many improvements and some new features for your Windows 11 operating system. VirusTotal: Setup: