: Once installed, the device often changes from "QUSB_BULK" to "Qualcomm HS-USB QDLoader 9008" in the Windows Device Manager. 2. How to Install the Driver
Insufficient power delivery or hardware watchdog timers resetting the unbootable chip.
: Programs like the OnePlus Restore Tool (MSMDownloadTool) or Google's Pixel repair tools. qusb bulk cid driver
: Once the driver is correctly identified (typically as "Qualcomm HS-USB QDLoader 9008" under COM ports), tools like the MsmDownloadTool or OnePlusRestoreTool can be used to reinstall factory firmware.
The (often appearing in Windows Device Manager as QHSUSB_BULK or QUSB_BULK_CID ) is not a conventional driver for daily device operation, but a crucial, specialized driver for Qualcomm-based devices. It serves as a diagnostic, rescue-oriented interface used when a device enters Emergency Download Mode (EDL) . This phenomenon is most commonly associated with Android devices, such as Google Pixels, OnePlus, or other Snapdragon-powered hardware that has suffered a severe software failure, often called a "hard brick". 1. What is the QUSB_BULK Driver? : Once installed, the device often changes from
This “unknown device” entry with a yellow exclamation mark is a strong indication that the device is but lacks the proper driver software on the host PC. In many recovery discussions, QUSB_BULK_CID is considered the “first sign” of a hard‑bricked device.
Once completed, the device should now appear as under the Ports section. Troubleshooting: Driver Installation Issues If you continue to have trouble, try these solutions: : Programs like the OnePlus Restore Tool (MSMDownloadTool)
Select from the list of models, click Next , and confirm any unsigned driver warnings by clicking Install this driver software anyway .