Microsoft kicked off 2026 with Windows 11 update KB5074109, released on January 13. The cumulative security update applies to Windows 11 versions 25H2 and 24H2 and includes security fixes, quality improvements, and changes from the previous optional preview update.
For users searching for the latest Windows 11 update 2026, this release mainly focuses on security, networking, power performance, Secure Boot, and system reliability.
What Does the Windows 11 January 2026 Update Fix?
Microsoft included several important fixes and security improvements in Windows 11 KB5074109.
Key improvements include:
- WSL networking: Fixes “No route to host” problems that could affect Windows Subsystem for Linux when accessing corporate resources through certain VPN connections.
- RemoteApp: Addresses connection failures in some Azure Virtual Desktop environments.
- Power performance: Fixes an issue where computers with a Neural Processing Unit (NPU) could remain powered on while idle.
- Secure Boot: Adds device-targeting information to help eligible PCs receive updated Secure Boot certificates through a phased rollout.
- Credential security: Introduces stronger restrictions on credential autofill during remote support and automated authentication scenarios.
- Windows component update: Updates WinSqlite3.dll after some security software identified the Windows component as vulnerable.
Who Gets the Windows 11 Update?
According to Microsoft, KB5074109 applies to:
- Windows 11 version 25H2 – all editions
- Windows 11 version 24H2 – all editions
For supported PCs, the update downloads and installs automatically through Windows Update. Businesses can also deploy it through Windows Update for Business, Microsoft Update Catalog, and Windows Server Update Services.
AI component updates included in the package apply only to compatible Copilot+ PCs.
Does the Update Include New Features?
This Microsoft Windows update focuses mainly on security and quality improvements rather than being a major feature upgrade.
However, Microsoft continued the gradual rollout of its redesigned Start menu to more Windows devices. Windows Update titles were also simplified to remove unnecessary technical information while keeping useful details such as the date, KB number, build, and Windows version.
Are There Any Known Issues?
Microsoft documented some issues after the January update. Certain Azure Virtual Desktop and Windows 365 users experienced connection or authentication problems. Some applications could also become unresponsive when opening or saving files to cloud-based storage. Microsoft later released updates addressing these issues.
How to Install the Windows 11 Update
For most users, Windows monthly security updates are delivered through the normal Windows Update system.
To check manually:
- Open Settings
- Select Windows Update
- Click Check for updates
- Install available updates
- Restart your PC if required
Final Thoughts
Windows 11 KB5074109 may not introduce a long list of flashy features, but it brings useful security, networking, power, and reliability improvements.
Keeping Windows updated helps users receive current security fixes and previously released improvements, making regular updates an important part of maintaining a Windows 11 PC.
Frequently Asked Questions
What is Windows 11 KB5074109?
KB5074109 is Microsoft’s January 2026 cumulative security update for Windows 11 versions 25H2 and 24H2.
Who gets Windows 11 KB5074109?
The update applies to all editions of Windows 11 25H2 and 24H2.
Is the Windows 11 January 2026 update automatic?
Yes. Microsoft says the update automatically downloads and installs through Windows Update on supported devices.
Does the update improve power performance?
Yes. It fixes an issue where some NPU-equipped devices could stay powered on while idle, affecting power performance.