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Windows 11 Preview Update Will Stop Microsoft Store Apps

Windows 11 users might want to hold off on one of the latest preview updates that are causing issues for .NET Framework 3.5 apps. Fortunately, there are some workarounds to the problem, but for now, your best bet is probably to avoid preview KB5012643 for now.

Microsoft acknowledged the problem (via BleepingComputer) in a status update on the official website Windows 11 Documents. It states that the issue is limited to users running Windows 11 version 21H2 with the KB5012643 update installed and means that apps using the .NET Framework 3.5 may not work properly or even not open.

This appears to be affecting specific components in the framework, so not all applications will be affected. It seems that applications that work with optional features like Windows Communication and Windows Workflow Foundation in the 3.5 framework are the most likely to have problems.

This can include a lot of console apps and things like Windows services. Microsoft has not provided a list of specific apps affected, so it’s best to assume that this could affect a wide variety of programs.

Microsoft recommends uninstalling the update if you experience any issues. You can get there by going to Windows Update settings in your PC’s system settings. From there, you will be able to view your update history and revert to a previous version.

If this is not possible, the other fix is ​​to re-enable the .NET Framework 3.5 and Windows Communication Foundation in Windows Features found in the control panel. Microsoft has more instructions on how to do this, but rollback is probably the easiest and most complete fix if it’s available to you. at least that 40 minutes boot time bug fixed.

Obviously, Microsoft is working to resolve this issue rather than just offering workarounds. The .NET Framework 3.5 is set to receive mainstream support for another two years, with five years of extended support to follow, so it’s not going anywhere anytime soon.

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