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Microsoft denies reports of rewriting Windows in Rust with AI
Wednesday, December 24, 2025 at 02:05 AM
Microsoft has clarified that it is not currently rewriting its Windows operating system using the Rust programming language and artificial intelligence, contradicting various recent reports.
Context
Microsoft has clarified it is not undertaking a wholesale, AI-driven rewrite of its flagship operating system, despite recent speculative reports. However, the company is pursuing a strategic goal to eliminate all C and C++ code from its software ecosystem by 2030. This project, led by the CoreAI division, aims to leverage AI agents to achieve a productivity benchmark of 1 engineer refactoring 1 million lines of code every month.
The transition to Rust addresses critical security concerns, as memory-safety issues constitute approximately 70% of Microsoft's vulnerabilities. CEO Satya Nadella noted that AI already generates 30% of the firm’s code, a figure projected to reach 95% by 2030. While a single "rewrite" event was denied, Microsoft continues to surgically integrate Rust into Windows 11 kernel and font components to enhance resilience following recent system malfunctions in late 2025.
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