Overview

• Under the revised WHCP rules, all USB-C ports on 24H2-certified devices must support PC charging, data transfer, and output to at least one external display while providing a minimum of 4.5 watts to connected accessories.
• Ports claiming 40 Gbps speeds are required to guarantee compatibility with both USB4 and Thunderbolt 3 accessories.
• Windows Diagnostics Data showed that 27 percent of USB4-equipped PCs previously triggered limited functionality warnings when users plugged in devices requiring unsupported alternate modes.
• Mandatory use of Windows’ native USB drivers on certified devices enables Microsoft to distribute future fixes through Windows Update instead of relying on OEM-specific drivers.
• These standards apply only to laptops and tablets shipping with Windows 11 version 24H2 or later and leave existing hardware and uncertified systems unchanged.