Windows 11 KB5012643 update is crashing some .NET apps.
Microsoft has warned Windows 11 users who have installed the April 25 preview update may face issues installing and launching .NET 3.5 Framework applications.
The issue affects systems running Windows 11, version 21H2 and KB5012643 optional update is installed.
Furthermore, the apps have specific components like Windows Communication Foundation (WCF) and Windows Workflow (WWF) components.
Though Microsoft hasn’t provided any examples of affected apps, it offers two workarounds for the issue.
- Uninstall the KB5012643 preview update for Windows 11 by following the below-mentioned steps:
- Type Windows Update Settings onto the search bar in the Windows start menu.
- From the options choose View Update History and then click Uninstall Update.
- Now you will see a list of installed updates where you need to search for KB5012643 and lastly click on the Uninstall Update button.
- The second workaround is to re-enable .NET Framework 3.5 and the Windows Communication Foundation (WCF) in Windows Features. Run the following commands from elevated command prompt window:
- dism /online /enable-feature /featurename:netfx3 /all
- dism /online /enable-feature /featurename:WCF-HTTP-Activation
- dism /online /enable-feature /featurename:WCF-NonHTTP-Activation
Last but not least Microsoft says that it will fix this issue in the upcoming update however didn’t offer any date. Possibilities are high that the update could be included in the next Patch Tuesday update.