Microsoft confirms Windows 10 update bug is crashing some apps

Windows 10 app crashing bug

Windows 10 has apparently hit further problems with its
February 2021 and
January 2021 updates, with several users reporting that
their desktop apps are crashing, or even
machines being put into blue screen loops.

Specifically, app crashing bug is happening to those who have
installed Windows 10 KB4598299 and KB4598301, which are for
20H2, version 2004 or version 1909. These updates were released
recently with the following improvements for .NET Framework 3.5
and 4.8:

  • Fixes an issue with scrolling when DPI scaling is not 100%
    and the user is scrolling at the end of TreeView.
  • Fixes an issue where ASP.Net apps fail during
  • Includes reliability improvements for automatic Native
    Image generation task.

The .NET Framework updates are installed automatically when you
check for updates on Windows Update and they’re usually aimed
at developers. However, there are reports online detailing all
sorts of problems after the patch, including numerous app
crashes highlighted on Microsoft
forum and Reddit.

The bug is also hitting Visual Studio, Windows
Presentation Foundation (WPF), and other products. On Feedback
Hub, one user reported that they’re unable to use Visual Studio
2019 after applying Windows 10 KB4598299.

“In Visual Studio 2019, I performed the traditional window drag
to relocate the Properties Window to be docked with the
Solutions window [and] Visual Studio crashed. Uninstalling
KB4598299 on both computers fixed the problem,” one user noted
in a post on Feedback Hub.

In a community forum, Microsoft confirmed that the problem
is in KB4598301 and the company is “working to get a fix
released”. In addition to a new .NET Framework update,
Microsoft is also working on new Visual Studio updates to
address the bug for more users in a short period of time.

Since the Windows Presentation Foundation (WPF) is affected
too, it’s likely that other apps are also crashing due to the

How to fix issues after Windows 10 KB4598299 or KB4598301

If you’re encountering similar issues, it might be worth
uninstalling KB4598299 or KB4598301 to see if that makes any
difference. To uninstall the update, open Control Panel >
Uninstall a program > View installed updates. On the next
screen, search for the KB number and click on the uninstall

Otherwise, the only other solution is to wait for the next
update, which is expected to land in the second week of

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