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What’s New in Windows Update KB5079391

Quick Tips
  • Windows Update KB5079391 was recalled on launch due to reported installation errors, but all features have been included in Update KB5086672.
  • The update improves monitor and Windows Hello reliability.
  • Smart App Control can now be toggled without an OS reinstall.
  • There are app and service improvements to File Explorer, Narrator, WinRE, and App Control for Business.

A new Windows update means changes, rollbacks, patches, and new features. Not all of these will be visible or shouted from the rooftops by Microsoft. If you’re curious about what Windows Update KB5079391 has to offer, this article will be your guide.

Not the Smoothest Start

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Right out the gate, Windows Update KB5079391 was running into problems. On its preview release date, March 26, some users reported installation issues, prompting Microsoft to temporarily recall the update. It wasn’t a fatal error, by any means, but did lead to a failure to install and an error code 0x80073712 appearing.

Microsoft re-released the major features on March 31, with the KB5086672 update. Features include similar functionally, just with a different version number. Let’s take a look at the features offered.

It’s just a question of when. In the meantime, let’s take a look at what will be offered with it.

Windows Update KB5079391 Features

Let’s explore what update KB5079391, or KB5086672 now offers:

Smart App Control

Smart App Control is Windows’ way of keeping track of your apps, using cloud-based information and active monitoring to ensure that nothing malicious is being executed by any app installed on your machine. Previously, enabling this service required users to reinstall Windows 11. The good news is that it can be easily toggled in Settings, under “App & browser control.”

Whats New in Windows Update KB5079391 2

Better Monitor Support

Do you have a monitor with a refresh rate over 100Hz, or a USB4 monitor connection? The good news is that the update provides better support for both, offering more reliable monitor performance. This also includes better power usage, including switching monitors to a low-power state when not in use.

Windows Hello Improvements

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For those signing in with facial recognition and fingerprint recognition in the “Windows Hello” section of Sign-in options, the latest update will provide some important reliability improvements to make this sign-in method feel more stable.

Further Changes to File Explorer

Your chief way of navigating around Windows also got some more improvements. File Explorer is now better at detecting and blocking any unauthorized downloads. Preview is also being improved, allowing users to unlock this feature for viewing files downloaded from the internet. No longer will users have to find workarounds to make this happen.

Better Stability in Recovery Mode

This won’t apply to everyone, but the update brings better stability to WinRE, especially for those running X64 apps on ARM64 devices.

Improvements to Narrator

If you’re a frequent user of the Narrator tool to help you navigate, then this app will offer you a better experience. Microsoft has improved Natural Voices, so they won’t sound so unnatural. It’s a cosmetic change, but one that can make all the difference if you’re a frequent user.

Better App Control for Business

Those using App Control for Business will find that the update has brought improved tagging. This includes better decision-making on behalf of the service, resulting in smarter, more reliable app tagging.

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Last updated on 26 April, 2026

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