Over the past few months, we've been running a freshness pass across the USB driver documentation on Microsoft Learn and the USB4 design guidelines. The goal is straightforward: make sure the docs ma...

Overview USB4™ brings high-speed connectivity and advanced tunneling capabilities to modern Windows devices. To help developers and IT professionals visualize and manage USB4 topologies, Windows pro...

Windows 11 includes built-in USB Type-C troubleshooting notifications designed to help users identify and resolve issues like slow charging, unsupported accessories, and faulty connections. These not...

The Blank Display (and Why It Can Still Happen)  Five minutes before a customer demo, I plug my 4K monitor into the USB-C port on a brand-new laptop. The display doesn’t light up, and now I’m scr...

USB 40Gbps (also known as USB4) is the latest USB standard, offering faster data transfer speeds, improved power delivery, and better performance. The second revision, USB 80Gbps, (also known as USB4...

As part of the MUTT (Microsoft USB Test Tool) family and a follow-on to the USB Type-C Connection Exerciser, we are excited to introduce the USB4 Switch: a USB Type-C 1:2 programmable switch, compati...

Background The UCSI driver in Windows communicates with the firmware UCSI component (called PPM or Platform Policy Manager) through the spec-defined command notification interfaces. While driver fa...