KB5074109: This update addresses an issue where you might experience RemoteApp connection failures
Windows 11 24H2Microsoft
January 13, 2026—KB5074109 (OS Builds 26200.7623 and 26100.7623)
Improvements
This security update contains fixes and quality improvements from KB5072033 (released December 9, 2025). The following summary outlines key issues addressed by this update. Also, included are available new features. The bold text within the brackets indicates the item or area of the change.
- [Compatibility] This update removes the following modem drivers: agrsm64.sys (x64), agrsm.sys (x86), smserl64.sys (x64) and smserial.sys (x86). Modem hardware dependent on these specific drivers will no longer work in Windows.
- [Networking (known issues)]
Fixed: This update addresses an issue where mirrored networking in Windows Subsystem for Linux (WSL) could fail causing “No route to host” errors and preventing access to corporate resources over VPN connections, even when the Windows host remained connected. This might occur after installing KB5067036.
Fixed: This update addresses an issue where you might experience RemoteApp connection failures in Azure Virtual Desktop environments. This might occur after installing KB5070311.
- [Power & Battery] Fixed: This update addresses an issue where devices with a Neural Processing Unit (NPU) might stay powered on when idle. This could affect power performance.
- [Secure Boot] Starting with this update, Windows quality updates include a subset of high confidence device targeting data that identifies devices eligible to automatically receive new Secure Boot certificates. Devices will receive the new certificates only after demonstrating sufficient successful update signals, ensuring a safe and phased deployment.
- [Windows Deployment Services (WDS)] This update introduces a change in behavior in which WDS will stop supporting hands-free deployment functionality by default. Detailed guidance for IT administrators is available in Windows Deployment Services (WDS) Hands‑Free Deployment Hardening Guidance. - [WinSqlite3.dll] Fixed: The Windows core component, WinSqlite3.dll, has been updated. Previously, some security software might have detected this component as vulnerable.
