is a professional-grade, software-only USB protocol analyzer developed by SysNucleus
The last option is especially telling: Microsoft quietly made vendor-grade USB tracing available for free, with no extra install , starting with Windows 8. But old habits (and old forum answers) die hard. usbtrace 64 bit download
For the careful researcher: skip the download. Use USBPcap + Wireshark or the built-in ETW traces. is a professional-grade