The May 2019 cumulative updates are now rolling out to the
compatible Windows 10 versions, including October 2018
Update. Direct download links for Windows 10
KB4494441 installers are also available on Microsoft
Update Catalog which is an alternate way to download the
As expected, Microsoft isn’t adding any new features to Windows
10 October 2018 Update with Patch Tuesday updates. The package
includes both security and non-security improvements. It’s
worth noting that most of the non-security improvements
included in this release are aimed at businesses and
KB4494441 bumps the PCs to Windows 10 Build 17763.503 and
as always, you can head to the Settings page to get the patch.
If you own multiple PCs or if you wish to update your system
without an active internet connection, you can grab the
installers from Microsoft Update Catalog.
KB4494441 Download Links for Windows 10
Windows 10 KB4494441 Direct Download Links: 32-bit (x86) and
KB4494441 Windows 10 Build 17763.503 Full Changelog
Today’s cumulative update provides protection against a
new subclass of speculative execution side-channel
vulnerabilities. Multiple security researchers have now
discovered a new class of speculative attacks against all
modern Intel processors and Microsoft is bundling fix for the
vulnerabilities in this release.
Microsoft is also adding some UK government-owned websites into
the (HSTS TLD) for Internet Explorer and Microsoft Edge.
Microsoft is addressing an issue that may caused error
1309 when users tried installing or removing certain types of
.msi and .msp files on a virtual drive. Lastly, the update
finally addresses an issue that prevented Microsoft Visual
Studio Simulator from launching on Windows 10.
May 2019 patch also includes security updates for Microsoft
Edge, Internet Explorer, Windows Graphics, Windows
Kernel, Windows Virtualization, Microsoft JET Database
Engine, Microsoft Scripting Engine, Windows Storage
and Filesystems, and Windows Server.
Earlier this year, Microsoft announced its plans to speed up
Windows 10 by introducing more robust fixes for
the Spectre and Meltdown vulnerabilities that caused such
a fracas last year.
Microsoft is bringing Retpoline, a new mitigation method
against Spectre variant 2 to all Windows 10 October 2018 Update
devices. Retpoline is designed to deliver improved
performance compared to the previous mitigations.
Retpoline was actually included in the March 1 update but it
was not enabled by default on production
devices. After two months of testing, Microsoft is now
enabling the new Spectre fix by default on Windows 10 October
2018 Update and no action is required by consumers.
The performance of Windows 10 could improve significantly
because of Retpoline. In a blog post, Microsoft stated
that the launch time of Office apps improved by about 25%
and Insiders also noticed overall faster functioning of the
It’s worth noting that
Windows 10 May 2019 Update (version 1903) also
uses Retpoline to improve performance.