Microsoft Clarifies: No Full Windows Rust Transition by 2030

28 Dec 2025

Microsoft has addressed rumors about transitioning the Windows operating system to Rust from C and C++. The company confirms no such full migration plan by 2030.

Research Project Goals

The discussion originated from a LinkedIn post by Microsoft manager Galen Hunt, mentioning a project for porting large C and C++ codebases to Rust. Hunt clarified it as a research project, focusing on methods for migrating languages, not a comprehensive Windows rewrite.

  • Hunt's post noted 2030 for a long-term perspective.
  • AI-supported processes to aid code migration efficiency.
  • Frank X. Shaw denied a full rewrite in Rust strategy.

Rust Use in Windows

While Microsoft is not planning a full transition, it confirms using Rust in parts of Windows for security advantages. Memory and ownership benefits of Rust address C/C++ vulnerabilities.

  • Rust used in select Windows 11 components.
  • Incremental deployment in security-critical areas.
  • No comprehensive migration scheduled.

Focus on Code Migration Tools

The research aims to enhance tools that enable large-scale code analysis and partial automated migration using AI. Microsoft emphasizes that this is part of broader efforts to increase software development efficiency.

In summary, Microsoft methodically applies Rust to specific security tasks in Windows while researching scalable language migration solutions. No complete Windows rewrite using Rust is planned or scheduled.

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