Update OSMedia

Once you have all your Microsoft Updates downloaded, you can run Update-OSMedia -Execute

Media and WinPE Phase

You can see the Servicing Stack, Cumulative Update, and NVMe Hotfix (if added) will be applied to all Windows 7 WinPE's

Operating System Phase

The Install.wim will then be updated with the Servicing Stack and Cumulative Updates

The remaining updates will be applied

and then the image will be completed