USB peripherals

USB-C ports are standard on contemporary Windows laptops, but not all deliver the same performance. A recent blog post by Microsoft revealed that 27% of Windows PCs with USB4 ports experience a "limited functionality" notification when connecting peripherals. This issue arises from inconsistent USB-C implementations by manufacturers, often leaving users unaware of their ports' capabilities. To address these challenges, Microsoft is updating the Windows 11 Hardware Compatibility Program (WHCP) to ensure that laptops shipping with Windows 11 version 24H2 will have WHCP certification. This certification guarantees universal USB data, charging, and display support across all USB-C ports, and full compatibility for USB4 ports with 40Gbps performance with Thunderbolt 3 and USB4 peripherals. The WHCP will enforce minimum capabilities for each USB-C version, requiring USB-IF certified silicon in certified laptops, ensuring USB Power Delivery capabilities for all ports, and mandating DisplayPort Alt Mode for external display support. Additionally, a new requirement for Microsoft's driver stack will ensure PCs receive the latest USB driver updates. USB4 introduces two performance tiers: 40Gbps and 80Gbps. New laptops with USB4 connections at 40Gbps will be required to ensure compatibility with USB4 and Thunderbolt 3 accessories. WHCP certification will also apply to 80Gbps USB4 ports, mandating 80Gbps transfer speeds and a specific mode for high-resolution displays. The WHCP certification will be enforced through a Hardware Lab Kit, incorporating user feedback and automated testing.