December 9, 2025—KB5072033 (OS Builds 26200.7462 and 26100.7462)
December 9, 2025—KB5072033 (OS Builds 26200.7462 and 26100.7462) Release Date:12/9/2025 Version:OS Builds 26200.7447 and 26100.7447 This cumulative update for Windows 11, version 25H2 and 24H2 (KB5072033), includes the latest security fixes and improvements, along with non-security updates from last month’s optional preview release. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates. Announcements and messages This section provides key notifications related to this release, including announcements, change logs, and end-of-support notices. Simplified Windows update titles A new, standardized title format makes Windows updates easier to read and understand. It improves clarity by removing unnecessary technical elements like platform architecture. Key identifiers such as date prefixes, the KB number, and build or version are retained to help you quickly recognize each update. For more details, see Simplified Windows Update titles or its accompanying blog post. December servicing update schedule Due to reduced operations during the Western holidays in December and New Year's Day, there will be no December 2025 non-security preview update in the second part of the month. The monthly security update will still be available as scheduled. Regular monthly servicing, including both security updates and non-security preview updates, will resume in January 2026. Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see Windows Secure Boot certificate expiration and CA updates. Microsoft Store apps updates Windows Updates do not include updates for Microsoft Store apps. If you're an enterprise user, see Microsoft Store apps - Configuration Manager. If you're a consumer user, see Get updates for apps and games in Microsoft Store. Improvements This security update contains fixes and quality improvements from KB5070311 (released December 1, 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. [Copilot] Fixed: This update addresses an issue where Ask Copilot didn’t activate the Click to Do window as expected. The window now appears in the foreground when you share data with Copilot. [File Explorer (known issue)] Fixed: This update addresses an issue where File Explorer briefly flashes white when you navigate between pages. This issue might occur after you install KB5070311. [Networking] Fixed: This update fixes an issue where external virtual switches lose their physical network adapter (NIC) bindings after a host restart. When this happens, the switches revert to internal mode, resulting in loss of network connectivity for virtual machines and blocking normal server operations. [PowerShell 5.1] Invoke-WebRequest now includes a confirmation prompt with a security warning of script execution risk. You can choose to continue or cancel the request. For additional details, see CVE-2025-54100 and KB5074596: PowerShell 5.1: Preventing script execution from web content. #KB5072033 #WindowsUpdate #December2025Update #Windows11 #Windows10 #OSBuild26200.7462 #OSBuild26100.7462 #MicrosoftUpdate #PatchTuesday #Windows11Update #Windows10Update #CumulativeUpdate #TechNews #SystemUpdate #WindowsPatch
