KB5072033 is the cumulative update for Windows 11, versions 25H2 and 24H2, released in December 2025. This update brings the latest security fixes and improvements for Copilot, File Explorer, and other components.
The KB5072033 security update applies to OS Builds 26200.7462 and 26100.7462 and includes both fixes and non-security improvements carried over from last month’s optional preview release.
Another important thing to note is Microsoft will officially end support for Windows 11 SE in October 2026. For more information, refer to a complete list of updates released for all versions of Windows 11.
KB5072033 Improvements and Fixes
This security update contains fixes and quality improvements from KB5070311 (released December 1, 2025). The following table outlines key issues addressed by this update.
| Component | Description |
|---|---|
| Copilot | KB5072033 resolves 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 | Resolves an issue where File Explorer briefly flashes white when you navigate between pages. |
| Networking | 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. |
| AppX Deployment Service | The AppX Deployment Service (Appxsvc) has moved to Automatic startup type to improve reliability in some isolated scenarios. |
Download Windows 11 KB5072033 Update
The KB5072033 update downloads and installs automatically from Windows Update and Microsoft Update. However, if you wish to get the standalone package(s) for this update, go to the Microsoft Update Catalog website and download it.
Note: If you’ve already installed previous updates, your device will download and install only the new updates included in this package.
