This year’s first cumulative update is now available for
Windows 10 version 21H2, version 21H1 and later. The patch is
out via Windows Update, but Microsoft has also published direct
download links for Windows 10 KB5009543 offline installers. The
offline installer is particularly helpful when you’re having
issues with Windows Update.
KB5009543 is a security-only patch and it will also include
last month’s optional cumulative update. However, this patch
doesn’t come with general improvements or non-security fixes.
That’s because there was no C release in December due to the
holiday season (announced by Microsoft last month).
Since there was no C release or optional cumulative update
release last month, there’s no new non-security content rolled
into the B release. For those unaware, a security update
includes fixes from previous months in a single package. In
other words, if you did not install December updates, you will
still get those fixes in today’s patch.
The last major update fixed various issues including a bug
where variable fonts render incorrectly. Another bug has been
fixed where the 32-bit version of Microsoft Excel could stop
working on certain devices. A bug that displays characters at
the wrong angle has been fixed in this release.
If you’re on Windows 10 version 21H2 (aka November 2021
Update), you will be getting Build 19044.1466. For those on
version 21H2, they will get Build 19043.1466 with the same set
of bug fixes. If you’re still on version 20H2, there’s a new
update with Build 19042.1466.
Remember that version 2004 support has ended so there’ll be no
new updates for it. For those on Windows 11, Microsoft has
KB5009566 for your device.
If you check for updates today, you’ll see the following
2022-01 Cumulative Update for Windows 10 Version 21H2
for x64-based Systems (KB5009543)
2022-01 Cumulative Update for Windows 10 Version 21H1
for x64-based Systems (KB5009543)
Download Links for Windows 10 KB5009543
Windows 10 KB5009543 Direct Download Links: 64-bit and
Windows 10 KB5009543 (Build 19044.1466) Full Changelog
Microsoft has fixed an issue where Japanese Input Method
Editors (IME) may not work as expected on Windows 10. The text
you enter could appear out of order and the text cursor will
have issues unexpectedly in apps that use the multibyte
character set (MBCS).
Additionally, Windows 10 Build 19044.1466 also includes the
servicing stack updates, which is responsible for Windows
Updates on your system. In theory, installing this security
patch should also make Windows Update itself reliable so that
your devices can also scan and receive updates.
Known issues in Windows 10 update
Microsoft is aware of a few known issues in Windows 10 update.
As per the changelog, a bug in Windows Update could affect the
Outlook search. This is a known issue in updates released after
November and it can block emails from appearing in search
results for Outlook users.
It’s not yet known how the search box is unable to search
emails on Windows 11, but Microsoft says it’s actively
investigating, and we’ll learn more about the situation in the
In the meantime, you can disable the Windows Desktop Search and
use Outlook’s built-in search box. If the workaround is not
working in your case or you’re unable to search emails on
Windows, open the Windows Registry Editor and go to the
To fix the issue, simply create a new key and name it “Windows
Search”. Edit its DWORD value to “PreventIndexingOutlook” and
press Enter 1 in the Value data box. You can now close the
Registry Editor, restart the Outlook app or Windows itself, and
a search box will start crawling emails again.
Microsoft is currently working on a fix and we don’t have an
ETA at the moment, but given a new optional update will be out
later this month, it is likely that the upcoming patch will
address this issue.