This is an update to the KB5012642 tag, and the problems it creates make particular components of the .NET 3.5 framework in Windows 11 unstable, so the applications that use them are crashing.
The .NET framework is a free, open-source platform used as a basis for creating and running applications on the Windows operating system and is used by many applications.
Microsoft has issued an official statement saying: “After installing this update, some .NET Framework 3.5 applications may have problems or may not be able to open. Applications affected by this problem use specific optional components in the .NET Framework 3.5, such as Windows Communication Foundation (WCF) and Windows Workflow (WWF). To resolve this issue, you can delete this update. ”
To delete this update, go to the:
- Start menu,
- type Windows Update Settings, select the item from the list, and
- select View Update History in the Windows Update settings window.
- Then choose Uninstall Update, find KB5012642, and click Uninstall.
If you cannot delete the mentioned update, there is a workaround. In the Start menu, type Windows Features, open it and reactivate the .NET Framework 3.5 and Windows Communication Foundation.
Although the KB5012642 update was released for Windows 11 in January, users have only recently started reporting application issues.
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