Microsoft has released a significant security update for Windows 10 22H2, Windows 10 Enterprise LTSC 2021, and Windows 10 IoT Enterprise LTSC 2021, identified as update KB5099539. This update is designed to patch recently discovered vulnerabilities, ensuring the security of Windows 10 systems. The update will be automatically installed on eligible systems starting today, eliminating the need for manual checks.
The KB5099539 update brings Windows 10 to build number 19045.7548. As a security-focused update, it does not introduce new features but does address several bugs. Notably, it fixes an issue in File Explorer where OneDrive shortcuts would stop working when File Explorer was run in administrator mode. Additionally, it corrects an incorrect error message that appeared when deleting files and resolves issues with certain keyboard shortcuts.
Alongside the KB5099539 update, Windows 10 PCs are also receiving new Secure Boot certificates. These certificates, used by most Windows devices, were set to expire starting in June 2026. Microsoft has been gradually updating these certificates on PCs and non-managed business devices over the past few months. Devices that have not yet received the newer certificates will continue to function normally, and standard Windows updates will still be installed.
To receive the KB5099539 update, a Windows 10 system must be enrolled in the Extended Security Updates (ESU) program. Systems enrolled in this program will continue to receive ESU updates until October 12th, 2027. This update is part of Microsoft's ongoing efforts to maintain the security and stability of Windows 10 systems.
