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VSTs and Virtual Drivers blocked by Security Update - 5077181

Zsolt Dunás-Varga 20 Reputation points
2026-02-18T13:44:00.37+00:00

As a developer, I am working on a .Net project, which is a music listening development application. The first compromise I had to make is that the NAudio and DryWetMidi packages are only handled by Visual Studio with WPF 6.0.

The other, more critical, is a Windows 11 system issue. To create the Midi connection, I use the free software LoopMidi and LoopBe1, which are the only two software available in this category, and I also tried my tests with Bome Midi Translator, which is paid. I did my tests with two VSTs, the Korg M1 VST and the Korg Wavestation VST.

The problem is that the Windows 11 security packages not only disable the operation of midiLoops, but also make it impossible for the above VSTs to function normally. The above applications probably use Virtual drivers, and their operation will be blocked with the update.

wusa /uninstall /kb:5074105

After removing the latest security package, the loops and VSTs started working properly.

wusa /uninstall /kb:5077181

What is the solution, because I had to stop additional Windows 11 updates to make the above VSTs and drivers work properly?

Windows development | Windows Driver Kit (WDK)
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Answer accepted by question author
  1. Pete Brown (Windows) 95 Reputation points Microsoft Employee
    2026-02-18T16:03:02.8566667+00:00

    Hi Zsolt.

    I don't know what's going on with the VSTs, as the update should not impact those. If you have more details there, please share.

    However, for MIDI, we have some known issues with loopMIDI and loopBE if you have the new Windows MIDI Services stack enabled. It's not that it disables them, it's that they need to be started before the MIDI service has started, and also before any MIDI-using apps have been started. This is a bug.

    Known issues and workarounds:

    https://devblogs.microsoft.com/windows-music-dev/windows-midi-services-rollout-known-issues-and-workarounds/

    Pete
    Microsoft


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  1. Q&A Assist
    2026-02-18T13:44:16.9833333+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    The issue you are experiencing with the MIDI loops and VSTs being blocked by Windows 11 security updates is likely related to the way Microsoft manages driver security and compatibility. When security updates are applied, they may include a blocklist for vulnerable drivers, which can inadvertently affect virtual drivers used by applications like LoopMidi and LoopBe1.

    To resolve this issue while still keeping your system secure, consider the following steps:

    1. Check for Updates: Ensure that you have the latest versions of the software you are using (LoopMidi, LoopBe1, and any VSTs). Developers often release updates to address compatibility with the latest Windows updates.
    2. Contact Software Vendors: Reach out to the developers of the virtual drivers and VSTs to inquire if they are aware of the issue and if they have plans to update their software to comply with the latest security standards.
    3. Driver Blocklist Management: Microsoft provides a vulnerable driver blocklist that is updated with each major release. You can check if the drivers you are using are on this list and if there are any updates or workarounds available.
    4. Use Windows Update for Business: If you are in a managed environment, consider using Windows Update for Business, which allows for more control over how updates are delivered and can help manage driver updates more effectively.
    5. Monitor Security Bulletins: Keep an eye on Microsoft's security bulletins for any announcements regarding specific updates that may affect your software.

    Unfortunately, uninstalling security updates is not a sustainable solution, as it exposes your system to potential vulnerabilities. It's best to find a way to keep your system updated while ensuring that your development tools function correctly.


    References:

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