The Update Bureau
Some Windows licensing and activation tasks no longer fail with error 0x80041008. The problem mainly affected organizations managing activation or product keys with commands.
Key changes 2 changes
Cuba’s clock stays on UTC-04:00 through the 2026–2027 daylight-saving period, and the update fixes printer and remote access problems. It also includes security updates for Windows.
Check the newer update, KB5136490Key changes 523 CVEs · 10 changes
Devices that miss automatic certificate trust updates get an updated trusted-root certificate payload. This out-of-band release is intended for systems that cannot reach Microsoft's certificate service or have automatic updates disabled.
Check the newer update, KB5131085Key changes 3 changes
An exploited Windows Shell security bypass is covered, and older systems can access drives encrypted on newer systems again. The update also addresses File History and Storage Spaces problems.
Check the newer update, KB5134124Key changes 946 CVEs · 7 changes
Addresses Remote Desktop connection and sign-in failures and fixes 8-channel or 3D audio problems on some USB Audio Class 1.0 devices.
Check the newer update, KB5126651Key changes 2 changes
Attackers are exploiting a Windows ALPC flaw to gain higher access. Remote-session audio also gets a fix, though some USB audio problems remain.
Check the newer update, KB5129238Key changes 622 CVEs · 5 changes
Attackers are exploiting a Windows networking flaw to gain higher privileges. File History backups to SMB network shares also work again.
Check the newer update, KB5122876Key changes 162 CVEs · 2 changes
Patches exploited Windows Shell and Active Directory Federation Services flaws, and expands automatic Secure Boot certificate coverage. Some keyboard shortcuts might briefly stop working in rare cases.
Check the newer update, KB5120238Key changes 313 CVEs · 9 changes
Secure Boot gets new status reporting and data controls, while a security change might hide some custom folder icons or names. Outlook and other apps that use push notifications get a fix for hangs.
Check the newer update, KB5099538Key changes 85 CVEs · 5 changes
The update expands Secure Boot certificate targeting and fixes Microsoft-account sign-in errors and a Remote Desktop display warning. Secure Boot certificates have started expiring in June 2026, so Microsoft recommends preparing devices.
Check the newer update, KB5094123Key changes 52 CVEs · 6 changes
Includes updated Azure-hosted device certificate checks. Microsoft also warns that Secure Boot certificates have started expiring and recommends preparing in advance.
Check the newer update, KB5087538Key changes 1 change
Fixes 99 vulnerabilities, including two critical remote code execution flaws in IKE service extensions and TCP/IP. It also adds security checks when opening .rdp files and changes Secure Boot reporting.
Check the newer update, KB5091573Key changes 99 CVEs · 5 changes
Secure Boot certificates have started expiring in June 2026, and this update expands phased targeting for devices eligible to receive replacements. It also adds a trusted-source warning in Windows System Image Manager and lets File History back up more filenames.
Check the newer update, KB5082123Key changes 40 CVEs · 3 changes
Fixes 22 vulnerabilities, including five that are being exploited, and fixes a shutdown problem on some Secure Launch-capable PCs with Virtual Secure Mode enabled.
Check the newer update, KB5078752Key changes 22 CVEs · 5 changes
Fixes file access errors in cloud storage and hangs in some Outlook setups that store PST files on OneDrive. A restart is required.
Check the newer update, KB5075904Key changes 2 changes
Some users can sign in over Remote Desktop again. Apps may still hang when opening or saving cloud files, and the update also improves the servicing stack.
Check the newer update, KB5078131Key changes 2 changes
An exploited Desktop Window Manager flaw is patched. Some apps can no longer autofill credentials during remote support or automated sign-in workflows.
Check the newer update, KB5077795Key changes 70 CVEs · 4 changes
The update fixes Message Queuing problems that followed the December 9, 2025 updates, an issue that primarily affected enterprise and managed IT environments.
Check the newer update, KB5073723Key changes 2 changes
Fixes 26 vulnerabilities, including an exploited Cloud Files driver flaw and a publicly disclosed PowerShell vulnerability. It also adds a web-script warning to PowerShell 5.1 and retires the taskbar People icon.
Check the newer update, KB5074975Key changes 26 CVEs · 3 changes
Patches an actively exploited Windows kernel flaw and addresses unexpected User Account Control prompts in some apps, including Autodesk AutoCAD.
Check the newer update, KB5071544Key changes 33 CVEs · 3 changes
An out-of-band cumulative update brings Windows 10 Enterprise LTSC 2019, version 1809, to build 17763.7922. The available source does not describe specific fixes or other changes.
Key security notes
Addresses 92 vulnerabilities, including flaws reported as exploited, and changes File Explorer so it disables previews of files downloaded from the internet. Review the Secure Boot certificate guidance and prepare for upcoming expirations.
Check the newer update, KB5068791Key changes 92 CVEs · 7 changes
Fixes 42 security vulnerabilities, including 7 rated Critical, and fixes empty boxes in the Chinese Simplified IME. It also narrows unexpected UAC prompts during some MSI repairs.
Check the newer update, KB5066586Key changes 42 CVEs · 4 changes
Addresses failures when resetting or recovering Windows 10 version 1809 devices after the August security update. It is intended for affected devices and is available from the Update Catalog.
Check the newer update, KB5065428Key changes 2 changes
Fixes 43 vulnerabilities, including three critical flaws, and restores word selection in the Microsoft Changjie Input Method.
Check the newer update, KB5066187Key changes 43 CVEs · 2 changes
.NET Framework is updated separately from Windows 10: each of these updates has its own KB and reaches Windows 10 Enterprise LTSC 2019 through Windows Update.