If Fix #1 fails, Windows 11 may be blocking the driver outright.
If your device is not being recognized or has a yellow exclamation mark in Device Manager , follow these steps: How to Fix USB Device Not Recognized in Windows 11 mxt usb device driver windows 11 hot
The MXT driver generally functions as a bridge for Windows to recognize external storage or multi-port adapters. If Fix #1 fails, Windows 11 may be
| Symptom | Fix | |---------|------| | Device works once, not after replug | Change COM port number: Properties → Port Settings → Advanced → COM Port Number → pick (avoid COM1/2). | | “Device descriptor request failed” | Unplug → delete USB Input Device in Device Manager → reboot → replug. | | Freezes after sleep | Disable USB selective suspend: Power Options → Change plan settings → Change advanced power settings → USB settings → USB selective suspend → Disabled . | | Code 10 (driver cannot start) | For Prolific: you may have counterfeit chip. Install PL2303 HXD (v3.3.2) as last resort, but Win11 often blocks it. Replace with FTDI-based cable. | | Intermittent hot-plug detection | Use a powered USB hub – many MxT devices draw more current than laptop ports provide. | | | “Device descriptor request failed” | Unplug
Check driver signature / Secure Boot
Windows 11 22H2/23H2 broke some older MxT drivers:
If your Windows 11 system is struggling with an MXT USB device, follow these steps to refresh the connection: Manual Driver Update Device Manager (Win + X). Universal Serial Bus controllers Right-click the MXT USB Device and select Update driver Browse my computer for drivers Let me pick from a list > select the generic USB Mass Storage Device Power Management : In the device's Properties , go to the Power Management