Windows 11 KB5074105 Update Resolves Boot, Sign-In, and Activation Issues

Microsoft has released the KB5074105 preview cumulative update for Windows 11, aimed at resolving various system issues. This update addresses significant problems related to sign-in, boot, and activation failures.

Overview of the KB5074105 Update

KB5074105 is part of Microsoft’s optional monthly updates that allow administrators to test new features and fixes ahead of the official Patch Tuesday releases. Unlike regular updates, this cumulative preview focuses on quality improvements rather than security fixes.

Key Fixes Included in KB5074105

This update introduces 32 changes, specifically targeting:

• Problems with Explorer.exe freezing during initial login when specific apps are set up as startup apps.
• Boot failures related to debugging modes in Windows Boot Manager.
• iSCSI boot failures that resulted in “Inaccessible Boot Device” messages.
• Issues with Windows license migrations that could hamper upgrades due to registration failures with the activation server.

Installation Instructions

To install KB5074105, users should:

• Open Settings on their device.
• Navigate to Windows Update and select ‘Check for Updates.’
• Click the ‘Download and install’ option when prompted, since it is an optional update.
• Alternatively, users can download the update directly from the Microsoft Update Catalog.

Build Enhancements

Once installed, the KB5074105 update upgrades Windows 11 systems to specific builds:

• 25H2 devices to build 26200.7705.
• 24H2 devices to build 26100.7705.

Additional Improvements with KB5074105

This update also offers further enhancements, including:

• Expanded Cross-Device Resume functionality, allowing users to continue tasks across devices.
• Increased support for peripheral fingerprint sensors under Windows Hello Enhanced Sign-in Security.
• Resolution of User Account Control issues that could cause system hang-ups.
• Fixes for graphics-related errors affecting certain GPU setups.
• Restoration of functionality in Windows Sandbox that was previously disrupted.

Changes to Update Identification

Beginning with this update, Microsoft will assign separate identifiers for Windows 11 and Windows Server 2025 to minimize confusion. This change is intended to clarify management and installation processes for administrators.

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