kb5095091 preview update

The kb5095091 preview update tag brings together coverage of Microsoft’s June 23, 2026 preview release for Windows 11 version 26H1, OS Build 28000.2340. The tagged report focuses on a compatibility problem acknowledged by Microsoft: Windows updates released on or after June 9 can stop some third-party applications from launching Microsoft Office apps or opening Office documents through OLE automation. It also records the current guidance: open Office files directly, while organizations can contact Microsoft Support for a mitigation. This page is useful for tracking the update’s Office integration impact and practical response for affected workflows.