Boost Windows 11 Arm with Improved x64 Emulation

Microsoft has rolled out update KB5067115 for Windows 11 25H2, enhancing x64 app emulation on Arm-based devices through PRISM.

Enhanced Performance and Compatibility

The update amplifies app compatibility and performance by incorporating additional x86 CPU features into the emulation process. This directly benefits desktops apps that faced issues on Arm architecture.

• Release: Update KB5067115 for Windows 11 25H2.
• Feature: Enhanced 64-bit x86 (x64) emulation on Arm devices.
• Tool: PRISM technology for better app compatibility.
• Setting: New Emulation Settings in Properties for developers to toggle behaviors.

Feedback and Testing

Microsoft encourages Windows Insiders to provide feedback on performance or compatibility issues. Reports can be submitted via Feedback Hub under Apps.

Update: 23 Jun 2026