| Problem | Solution | |---------|----------| | Device shown as “Unknown” | Reinstall driver, use Zadig to replace with WinUSB (for fastboot). | | “Driver not signed” error | Boot Windows into . | | ADB detects but not fastboot | Manually set VID 0x04E8 and PID 0x6860 in android_winusb.inf. | | Odin fails at setup connection | Use original USB cable, USB 2.0 port, run Odin as admin. | | MTP not working | Uninstall “Portable Device” driver, let Windows reinstall. |