Because many of these drivers are unsigned, Windows 10 and 11 may block them. Go to Settings > Recovery > Advanced Startup .
: Some users report the Vive Cosmos appearing as "QUSB-BULK" when the system fails to recognize the headset's standard drivers. qusb bulk cid driver
The PC recognizes the phone's hardware ID ( USB\VID_05C6&PID_9008 ) but lacks the specific driver, listing it in Device Manager as an unknown QUSB_BULK device. Because many of these drivers are unsigned, Windows