: Many Google Pixel 3 users encountered this error due to a "natural lifecycle" failure of the internal eMMC/UFS memory. In these cases, the phone may require a motherboard replacement or advanced hardware repair via a Mipi tester box to reflash the chip.
Open Command Prompt as Admin and run: bcdedit.exe -set loadoptions DDISABLE_INTEGRITY_CHECKS followed by bcdedit.exe -set TESTSIGNING ON . :
Seeing the entry in your Windows Device Manager typically indicates that your Qualcomm-based device—most often a Google Pixel, OnePlus, or other Android smartphone—is in Emergency Download Mode (EDL) . qusb bulk cid driver
To resolve the QUSB_BULK error, you need to manually replace it with the driver.
: On Windows 10 or 11, you may need to disable integrity checks so Windows will accept the unofficial or older Qualcomm drivers. : Many Google Pixel 3 users encountered this
If your device shows as QUSB_BULK_CID after it suddenly died or failed an update, simply installing the driver might not be enough to fix the phone.
: If successful, the entry will move to the "Ports (COM & LPT)" section in Device Manager. Troubleshooting the "Hard Brick" : Seeing the entry in your Windows Device
The term "QUSB_BULK_CID" is a generic identifier used by Windows for a Qualcomm chipset device that is waiting for instructions in its most basic boot state. Without the proper drivers, the PC recognizes the hardware but doesn't know how to interact with it, preventing you from using recovery tools like , QFIL , or the OnePlus Restore Tool . How to Install the Correct Driver