In the Program Files/wireshark/extcap folder you need to have the USBcap program added. (Windows 7 Ultimate SVC Pack1)
You can find the program in the Program Files/USBPcap/ folder.
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\Gustavo>cd C:\Program Files\Wireshark\extcap
C:\Program Files\Wireshark\extcap>dir
Volume in drive C has no label.
Volume Serial Number is F6CF-862A
Directory of C:\Program Files\Wireshark\extcap
18/11/2024 09:44 <DIR> .
18/11/2024 09:44 <DIR> ..
20/05/2024 18:01 330.992 sshdump.exe
20/05/2024 18:01 326.896 Udpdump.exe
22/05/2020 06:00 51.328 USBPcapCMD.exe
3 File(s) 709.216 bytes
2 Dir(s) 200.515.911.680 bytes free
C:\Program Files\Wireshark\extcap>
Have you installed USBPcap? What interfaces are displayed in Wireshark?
Do you mean "capturing raw USB traffic over the USB bus" or do you mean "capturing network traffic over a network interface that happens to be a USB device"?