KB5013943 is crashing apps with
0xc0000135 and other vague error messages,
breaking down Event Viewer, and even causing Blue Screen of
Death on Windows 11.
If you installed the
May 2022 cumulative update on Windows 11, you might have
noticed that many of the apps you use all the time aren’t
working as they used to. KB5013943, the mandatory security
update, is crashing certain apps that use .NET framework. In
some cases, users are getting an error code:
A similar issue was reported in the optional update, but it was
not widespread. The bug seems to have slipped into the
production channel with May 2022 update and more users are
affected this time. The crashes are common among apps that use
.NET Framework and apps like Discord or Microsoft Teams are
Looking at Microsoft’s Feedback Hub confirms that app crashes
started earlier today following the release of May 2022
updates. The culprit appears to be a compatibility issue
between the NET framework and Windows 11. For those unaware,
the .NET framework is a software development framework for
building and running apps on Windows.
According to reports received by us, many apps appear to be
affected. For example, the Corsair ICUE app does not work after
installing the update, with Corsair Service failing to start
and users keep getting error notifications.
Some people also flagged issues with ShareX, KeePass, Microsoft
Teams and other apps like Visual Studio installer. One user on
Feedback Hub claimed that they are
unable to launch Microsoft Teams due to the error message
“process exited with code 3221225781 (0xc0000135)”.
“I just installed Windows 11 Update KB5013943, and it breaks
the Sound Blaster Command app. The app would not start, instead
I get an error saying “sound blaster command unable to start
correctly 0xc0000135″. Uninstalling KB5013943 update fixes the
problem,” another user noted.
How to fix KB5013943 issues on Windows 11
Since the issue seems to be related to .NET Framework, some
users are reportedly getting the following error after
installing May 2022 cumulative update:
“The application was unable to start correctly
(0xc0000135). Click OK to close the application”.
If you’re affected, there’s no official fix as of yet, but
users have told us that reinstalling .NET frameworks (3.5 or
4.8 whichever is installed) should resolve the problem.
If the .NET framework is not installed, you need to enable it
manually. If it’s already enabled, you will need to disable and
enable it again to fix the problem.
To fix app crashes caused by (KB5013943) Windows 11 May
2022 update, follow these steps:
- Open Windows Search.
- Search “Turn Windows features on or off“.
- Disable and enable all .NET frameworks.
- Click on OK.
- Reboot your system.
In the above steps, if you don’t use .NET Framework 3.5, there
is no need to install it, but make sure .NET Framework 4.8 or
newer is reinstalled.
We are not sure what caused the issue, but simply turning on
the .NET frameworks apparently resolves the problem.
If for whatever reason, you can’t find .NET Framework in
Add or remove features pop-up, you can
alternatively search for it on Microsoft’s downloads
Blue Screen of Death error joins app crashes
A freshly introduced bug in Windows 11 has apparently been
causing havoc by crashing some users’ machines with the
infamous Blue Screen of Death. In worst cases, it even triggers
the most dangerous boot loop (i.e. repeated rebooting).
The problem lies with May 2022 Update for Windows 11 and the
average home users simply downloading updates are also affected
by this issue. In other words, Windows 11’s latest bug affects
both consumers and enterprises.
“After installation of 2022-05 Cumulative Update for Windows 11
for x64-based Systems (KB5013943) and 022-05 Cumulative Update
for .NET Framework 3.5 and 4.8 for Windows 11 for x64
(KB5013628) the Microsoft Studio 2 would fail to boot
generating error BSOD “APC_Index_Mismatch”, The only way to
boot the machine was to restart and then on the maintenance
screen choose “reboot”. Then it would boot to the OS, repeating
the error again on the next shutdown and restart. The problem
seems intermittent”, one of the affected users noted.
Problems like Blue Screen of Death and boot loop or app crashes
are one of the reasons why people choose to defer updates. In
case of a security update, if you don’t defer or pause updates,
Microsoft will download and automatically apply the patch to a
Windows 11 PC, which can be a cause of frustration.
How to uninstall Windows 11 May 2022 update
Uninstalling a Windows update certainly comes in handy if your
computer is acting strangely after the deployment of a recent
It’s generally a good idea to install security updates as soon
as possible and we don’t recommend removing the security
updates unless necessary. If your device is not in a usable
state, you’ll want to be able to roll back security updates, so
you can fix app crashes or Blue Screen of Death errors until a
new update can be released.
Thankfully, it is still possible to uninstall a security update
if you installed it today or yesterday:
- Open Settings.
- Click on Windows Update.
- Click the Update history page.
- Locate Uninstall updates option under the
“Related settings” section.
- Select the update.
- Click on Uninstall.
In case you’re unable to roll back the patch, you may need to
perform an in-place upgrade using
Windows 11 ISO.
List of issues in KB5013943 Windows 11 update
Here’s a list of official known issues in the patch:
- Recovery discs (CD or DVD) created using the Backup and
Restore app in Control Panel might be unable to start.
- Some apps that use .NET Framework 3.5 might have issues or
might crash after applying the update. The affected apps use
certain optional components and not all apps are affected.
- Apps that use GPUs might crash on Windows 11 after the May
update. As per Microsoft, it only affects apps that use
Update: In updated support documents, Microsoft acknowledged
two bugs crashing apps on Windows 11, as highlighted above.