After deploying Windows 10 KB4559309, which is an automatic
update, some people are complaining that their PCs are taking
longer to boot into Windows. The problem has been reported by
users in Microsoft’s community forum and Microsoft is now
finally investigating the situation, according to a forum
we first reported on the issues in June, countless other
users have started posting complaints of performance issues
that they’ve faced after installing Windows 10 version
In addition to slower boot time, users noted that Windows 10
load apps and web pages slower after applying this automatic
update, which was forced via Windows Update.
Windows 10 KB4559309 has been released to replace the old Edge
browser with the new Chromium-based one, but it appears that
something within the update process is hampering the
performance of some laptops and desktops after the
installation, especially during boot up.
The update is also pushed out automatically, so users don’t
have the option to opt as you would with a normal cumulative
update. Users have alleged in the Microsoft forum
and Feedback Hub posts that Windows 10 could begin to slow down
after the update installation.
In the same forum thread, a Microsoft moderator has finally
confirmed that Microsoft Edge team is currently in the process
of investigating this problem, and will report back when it
Microsoft is also asking users to submit the report via the
Feedback Hub, which should help the company in its
“I have spoken to Missy Quarry, from the Edge team, and they
are investigating this problem. However, they really need more
details submitted though the Feedback Hub on Windows 10,” a
Microsoft forum moderator noted.
Usuallly, you can fix issues with Windows Update by simply
installing the flauty update from Control Panel. In this case,
you can’t do that as KB4559309 uninstallation process will
As one user pointed out, when you install KB4559309 and upgrade
to a new version of Windows 10, KB4559309 won’t be listed as
installed in the Control Panel as logs are cleared.
If you notice performance issues after applying this patch,
you’ll need to use the System Restore feature and revert back
How to prevent Windows 10 KB4559309
If you haven’t installed the update, you can easily prevent
Windows 10 KB4559309 by manually downloading the Chromium-based
Windows 10 automatically blocks the offending update from
installing onto your device when it detects the new Microsoft
Edge on your system.