If the driver prevents your system from starting normally:
Some legacy software (like old versions of PuTTY) can’t "see" COM ports higher than COM4. awm 20251 console cable driver download fix
| Error | Cause | Fix | |-------|-------|-----| | Code 10 | New driver with old chip | Install v3.4.63.290 with signature enforcement off | | Code 31 | Driver corrupt or mismatched | Uninstall all serial drivers with pnputil -e and purge | | “Device cannot start (Code 10)” after legacy driver | Windows Update replaced driver | Disable automatic driver updates: System → Advanced System Settings → Hardware → Device Installation Settings → “No” | | COM port number > 20 | Serial port collision | In Device Manager → Port Settings → Advanced → Change COM port to COM3-COM9 | | Works on USB 2.0 but not USB 3.0 | Power management / signal levels | Use a USB 2.0 hub between USB 3.0 port and cable | If the driver prevents your system from starting
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