Microsoft KB5064649 Update Enhances Phi Silica AI on Intel Windows PCs

Here is a summary of the Microsoft KB5064649 update for the Phi Silica AI component (version 1.2507.793.0) for Intel-powered systems:

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What is KB5064649?​

• Phi Silica AI Component:
  This is a Transformer-based local language model. It's Microsoft's most powerful NPU-tuned local language model, specifically optimized for efficiency and performance on Windows Copilot+ PCs, yet offers capabilities found in large language models (LLMs).

Key Details​

• Update Version: 1.2507.793.0
• Target Systems: Copilot+ PCs using Intel processors
• Windows Versions:
• Windows 11 SE, version 24H2
• Windows 11 Enterprise & Education, version 24H2
• Windows 11 Enterprise Multi-Session, version 24H2
• Windows 11 Home & Pro, version 24H2
• Windows 11 IoT Enterprise, version 24H2

Improvements​

• The update includes unspecified “improvements to the Phi Silica AI component for Windows 11, version 24H2.”

How to Obtain​

• The update is delivered automatically via Windows Update.
• Prerequisite: You must have the latest cumulative update for Windows 11, version 24H2 installed.

Replacement Information​

• This update replaces the previously released KB5063134.

How to Verify Installation​

• Go to Settings > Windows Update > Update history.
• Look for:
  2025-07 Phi Silica version 1.2507.793.0 for Intel-powered systems (KB5064649)

Additional Notes​

• This update applies to Copilot+ PCs only.
• It's part of Microsoft's approach to enable more sophisticated on-device AI directly on supported systems, leveraging the NPU.

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Reference:
KB5064649 - Microsoft Support

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Source: Microsoft Support KB5064649: Phi Silica AI component update (version 1.2507.793.0) for Intel-powered systems - Microsoft Support