Microsoft pulls KB5079391 Windows update over install issues

Microsoft has paused the rollout of the Windows 11 preview update KB5079391 after reporting began to surface that the non-security update could fail to install on some systems. The update, described as a preview and non-security in nature, was designed for Windows 11 versions 24H2 and 25H2 and carried 29 changes intended to refine features such as Smart App Control and Display enhancements, along with under-the-hood improvements to reliability and performance.

Users began seeing a familiar installation error on affected devices: Some update files are missing or have problems. We'll try to download the update again later. Error code: 0x80073712. This error, which points to missing components or broken package state, has historically been a cue for Windows Update to halt a rollout while Microsoft investigates the underlying cause. In this case, the response was to temporarily stop the deployment to prevent additional impact while engineers work toward a fix.

Microsoft confirmed the pause and indicated that the update’s availability would be limited during the investigation. The practical upshot for many Windows 11 users is that they may not see KB5079391 offered through Windows Update for the time being. While a precise timeline for a fix was not shared, expectations were set that a resolution would likely arrive before the next Patch Tuesday, which is scheduled for April 14. The rationale behind this timing is to give customers a window to test the fixes and updates in a controlled manner before rolling the patch out more broadly again.

This latest pause follows a string of other Windows 11 notices and fixes that have characterized the March 2026 update cycle. About a week prior, Microsoft released an emergency out-of-band update (KB5085516) aimed at solving a separate, significant issue: sign-in problems with Microsoft accounts across multiple core services and apps, including Teams, the Edge browser, Microsoft 365 Copilot, and OneDrive. The rapid sequence of fixes highlights how a single update wave can trigger cascading effects across broader Microsoft services, prompting rapid responses from the vendor.

In the same period, Microsoft pushed additional out-of-band hotpatches for devices enrolled in hotpatch-enabled Windows 11 Enterprise deployments. These patches addressed a Bluetooth visibility bug that could complicate device pairing and discovery and a separate security flaw tied to RRAS (Routing and Remote Access Service) management tooling. Separately, guidance was issued to fix access issues on the C: drive that appeared on certain Samsung laptops, tracing the problem to a buggy version of the Samsung Galaxy Connect (or Samsung Continuity Service) app.

Taken together, the sequence of events around KB5079391 underscores a few enduring truths about Windows updates in 2026. First, even non-security previews can carry meaningful changes that touch on authentication, device stability, and peripheral services, so a troubled rollout can ripple into multiple parts of the ecosystem. Second, Microsoft’s response pattern—pause, isolate the offending update, and communicate the scope of the impact while offering workarounds or fixes in parallel—remains consistent, albeit rapid and sometimes abrupt. Finally, the convergence of monthly Patch Tuesday releases with urgent out-of-band patches means enterprise environments and power users often manage a mix of scheduled and emergency updates in a single cycle, making vigilance and testing more important than ever.

For admins and enthusiasts monitoring this story, keeping an eye on the Windows Update deployment status and forthcoming Microsoft notices will be essential. When a new build or revised KB5079391 package surfaces, it will likely come with clarified installation prerequisites, any known-issues notes, and a defined timeline for re-release. In the meantime, the broader March 2026 update wave continues to bring improvements and occasional hiccups, reminding users that even well-trodden update paths can encounter unexpected glitches that require careful coordination and timely responses.