KB5063878: [Authentication] Fixed: This update addresses an issue that caused delays during sign-in

August 12, 2025—KB5063878 (OS Build 26100.4946)

Highlights
This update addresses security issues for your Windows operating system.

Improvements
This security update contains fixes and quality improvements from KB5062660 (released July 22, 2025). The following summary outlines key issues addressed by the KB update after you install it. Also, included are available new features. The bold text within the brackets indicates the item or area of the change.

• [Authentication] Fixed: This update addresses an issue that caused delays during sign-in on new devices. The delay was due to certain preinstalled packages.

AI Components
This release updates the following AI components:

• Image Search : 1.2507.793.0
• Content Extraction : 1.2507.793.0
• Semantic Analysis: 1.2507.793.0
• Settings Model : 1.2507.793.0