Watch out for new issues in Windows 11 KB5014019 update

Windows 11 KB5014019 issues

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

KB5014019 is an optional update and it doesn’t come with
security features. For those unaware, optional updates, which
Microsoft designates as C updates are generally released during
the third or fourth week of each month.

Optional updates are clearly labelled as ‘preview’ on Windows
Update and they’re used to test non-security fixes,
improvements and even new features. In this case, KB5014019
actually comes with a couple of new features, including

support for Windows Spotlight on desktop, a feature that
was originally supposed to debut with version 22H2.

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

Issues in KB5014019 for Windows 11

As mentioned at the outset, Trend Micro says it’s aware of an
issue where the update could break features like 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 would
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 crashing its
ransomware protection and other features, and a fix will be
issued ahead of the June 2022 Patch Tuesday update.

Installation issues with the latest Windows 11 optional update

On Reddit and Feedback Hub, users have flagged
another problem where the optional update will fail 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 could not be installed, but you can try
again ( 0x800f081f) “. The update KB5013943 was recently added
with the same result. I repeated the procedure several times a
day,” one of the affected users noted.

Additionally, it looks like a bug that affects .NET Framework
apps isn’t fully fixed in the patch and it could break down the
capabilities of certain apps like SteelSeries GG.

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