Rustissimo Fixes: Windows Update KB5077181 Breaks Virtual MIDI Device - Workarounds and Solutions

Date: February 24, 2026

Rustissimo, the RUST instruments concert creator app that lets friends build and perform synchronized concerts, has encountered a setback following the release of Microsoft's Windows 11 cumulative update KB5077181.

The update introduces a bug that blocks the creation of the virtual MIDI device essential for Rustissimo's communication with the underlying RUST engine.

Bug Fixes: The latest patch addresses this exact issue, restoring the ability to instantiate the virtual MIDI device and enabling normal concert creation.

Work‑around Instructions: Users experiencing the problem can:

• Uninstall update KB5077181 via Control Panel or using the Run command.
• Pause future Windows updates to prevent re‑introduction of the bug.
• Check network configuration, ensuring DHCP is enabled and adapter drivers are up to date.
• Monitor the Windows Release Health dashboard for an official fix.

These steps should restore functionality while the development team works on a permanent resolution.

More details are available on the official Steam announcements page: https://steamcommunity.com/games/1222580/announcements/detail/501724652288083850.