| Error Code | Message | Cause | Fix (x64 Specific) | | :--- | :--- | :--- | :--- | | | Driver not digitally signed | Windows DSE is active. | Reboot into "Disable Driver Signature Enforcement" OR use Driver Signature Enforcement Overrider (DSEO). | | Code 10 | Device cannot start | The Preloader driver timed out. | The phone exited Preloader. Disconnect battery, reconnect, and click "Download" in SP Flash Tool within 3 seconds . | | Code 43 | Device descriptor failed | USB cable or port issue. | Use USB 2.0 port (not USB 3.0). Replace the USB cable with a data-sync cable (not charge-only). | | Code 19 | Corrupted registry | Old driver leftovers. | Run USBDeview → Uninstall all grayed-out MTK devices → Delete driver packages from C:\Windows\System32\DriverStore . |
Troubleshoot > Advanced options > Startup Settings > Restart to "Disable driver signature enforcement". Step-by-Step Manual Installation (x64) mtk usb serial port driver x64 top
Because these drivers are often unsigned, standard installation might fail on 64-bit systems without specific steps: Disable Driver Signature Enforcement : This is mandatory for Windows 10/11 x64. Update & Security Restart Now under Advanced Startup. Troubleshoot Advanced options Startup Settings to disable driver signature enforcement. Manual Installation (for Device Manager , select your PC name, and click Add legacy hardware | The phone exited Preloader
Here’s what you need to know to find the driver solution.
After the reboot, press or F7 to select "Disable driver signature enforcement" . 2. Manual Installation via Device Manager Once the computer restarts with signatures disabled: how to install MTK VCOM USB Preloader Drivers
, you see a frustrating yellow exclamation mark next to "MTK USB Port". To save the phone, you must find the MTK USB Serial Port Driver
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