To fix the "Qualcomm HS-USB QDLoader 9008" port issue for Oppo and Vivo devices, you typically need to manually force the correct driver installation or disable Windows driver security features. This 9008 mode (EDL mode) is required for flashing firmware or unbricking devices Quick Troubleshooting Steps Resolution Yellow Exclamation Mark (!) Driver Signature Enforcement in Windows settings and reinstall. Shows as "QHSUSB_BULK"
If your device shows as "QHSUSB_BULK" or has a yellow warning icon, you must disable Driver Signature Enforcement on Windows. Command Prompt as Administrator. Type the following commands: bcdedit.exe -set loadoptions DDISABLE_INTEGRITY_CHECKS bcdedit.exe -set TESTSIGNING ON your computer.