Windows 11

Beware of new issues in Windows 11 update KB5014019

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A third-party antivirus from Trend Micro is reportedly failing to complete virus scans completely, apparently due to some sort of bug in Windows 11 KB5014019. The exact reason isn’t clear yet, but Trend Micro claims the problem is related to User Mode Hooking (UMH), a feature used in its antivirus protection tool.

KB5014019 is an optional update and does not include security features. For those who don’t know, optional updates, referred to by Microsoft as C-updates, are generally released in the third or fourth week of every month.

Optional updates are clearly labeled as “preview” on Windows Update and they are used to test non-security fixes, improvements and even new features. In this case, KB5014019 comes with some new features, including support for Windows Spotlight on desktop, a feature that was originally supposed to debut with version 22H2.

Microsoft previously warned that the optional updates should not be distributed to all client systems. Instead, optional updates allow users to test the non-security fixes the company plans to ship with Patch Tuesday next month.

Issues in KB5014019 for Windows 11

As mentioned at the outset, Trend Micro says it is aware of an issue where the update could break features such as the ransomware protection feature.

A bug in KB5014019 affects the UMH component used by several Trend Micro endpoint and server protection products. It is also used for advanced ransomware protection, but the driver will stop working after deploying the optional preview update.

†[Users who apply the patch] and reboot would then find that the Trend Micro UMH driver would stop,” the company said

The company is working on a fix to address the bug that crashes ransomware protection and other features, and a fix will be released ahead of the June 2022 Patch Tuesday update.

Installation issues with the latest Windows 11 optional update

On Reddit and Feedback Hub, users have: marked another issue where the optional update fails to install with vague error messages.

“For several days after receiving the message “2022-05 Cumulative Update for Windows 11 for x64-based Systems (KB5014019) is available” I gave OK, but the system always replied: “This update cannot be installed, but you can try again (0x800f081f) “. The update KB5013943 was added recently with the same result. I repeated the procedure several times a day,” commented one of the affected users.

In addition, it appears that a bug affecting .NET Framework apps is not fully resolved in the patch and it may break the capabilities of certain apps such as SteelSeries GG.

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