KB5043131: (OS Build 19045.4957) Preview

Highlights
Note: Below is a summary of the key issues that this update addresses when you install this KB. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.

- [Start menu] New! This update might move your profile picture to different positions. There is also a new background color for the left pane on the menu. This color change makes the commands on the menu stand out more.

- [IE mode] Microsoft Edge sometimes stops responding when you use IE mode. ​​​​​​​

- [Media playback] Playback of some media might stop when you use certain surround sound technology.

Improvements

This non-security update includes quality improvements. Below is a summary of the key issues that this update addresses when you install this KB. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.

- [Microsoft Entra single sign-on (SSO)] The SSO notice that the European Digital Markets Act (DMA) requires prompts too often. This occurs when you authenticate using a certificate. To learn more, see Upcoming changes to Windows single sign-on.

- [Country and Operator Settings Asset] This update brings COSA profiles up to date for certain mobile operators.

- [File Explorer and taskbar] Windows server stops responding when you use apps like File Explorer and the taskbar.

- [Windows Update opt-in notifications] They now appear when you sign in.

- [Directory enumeration] This might fail if a directory has symbolic links that have long target names.

- [Microsoft Defender for Endpoint] Work Folders files fail to sync when Defender for Endpoint is on.