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Old ADB or serial drivers can hijack the 9008 port.

If the above steps don't work, you can try using a third-party tool to fix the error code 9008. Tools like or QPST Tool can help you fix the USB driver issue.

Expand and Universal Serial Bus controllers .

Short the two specific on the motherboard using tweezers. Plug in the USB cable while maintaining the short. Step 6: Verify the Device Connection

If the automated installer fails, you may need to install the driver manually via Device Manager:

Before deploying the driver solution, prepare the host operating system and gathering your required deployment files: Tool Component Required Specification Source Link / Provider Qualcomm HS-USB QDLoader 9008 Setup QDLoader Official Driver Host System Windows 10 or Windows 11 (64-bit) DriverIdentifier Platform Connectivity High-Quality USB 2.0 Micro/Type-C Cable Original OEM Phone Hardware Utility Tool Device Manager Control Panel Component Native Microsoft OS Application Step-by-Step Installation & Fix Procedure Step 1: Disable Windows Driver Signature Enforcement

Upon reboot, a list of options will appear. Press or F7 on your keyboard to select "Disable driver signature enforcement."

Qualcomm 9008 Mode (EDL) is an emergency protocol hardcoded into the boot ROM of Qualcomm chipsets. It bypasses the Android operating system entirely. It forces the hardware to communicate directly with flash utilities running on a PC. Why Does the Connection Error Occur?

Comprehensive Guide: Oppo & Vivo USB Driver Fix 9008 (Qualcomm HS-USB QDLoader)

Do not rely on generic auto-drivers. Download the official suitable for OPPO/Vivo:

Locate any entry named Qualcomm HS-USB , Oppo USB , Vivo USB , or Unknown Device .

If your PC isn't seeing the 9008 port at all, use these methods to force the connection:

Once you’ve fixed the driver, protect against recurrence:

Your device should now be showing a stable in Device Manager. You can now proceed to flash the stock firmware using QFIL or MSM Download Tool.

Always use the version that matches your system architecture (32-bit vs. 64-bit). Reliable repositories include:

Once installed, verify the connection:

If it appears as QHUSB_BULK with a yellow alert symbol, your driver did not install correctly. Repeat Step 2. Troubleshooting Guide Driver Shows a Yellow Warning Triangle (Error Code 10 / 52)