U232 P9 Driver Windows 10 ((new)) 〈LIMITED〉

Here’s a helpful guide for installing and troubleshooting the U232-P9 USB-to-Serial adapter driver on Windows 10.

  1. Download Zadig (zadig.akeo.ie).
  2. Plug in the U232 P9 adapter.
  3. Open Zadig → Options → List All Devices.
  4. Select your adapter from the dropdown (may show as "USB Serial Converter").
  5. In the target driver field, select usbser (or WinUSB for some serial apps).
  6. Click Replace Driver.
  7. Reboot and manually assign a COM port via Device Manager.

🛠️ Step 3: Manual driver installation (for legacy chips)

  1. Unplug the adapter.
  2. Uninstall existing driver:
    • Bits per second: Match your device (often 9600 or 115200)
    • Data bits: 8
    • Parity: None
    • Stop bits: 1
    • Flow control: None (unless required)

    If you see a yellow exclamation mark with a "Code 10" error, it often means you are using an older Prolific chip that is no longer supported by newer driver versions. In this case, you may need to "Roll Back Driver" to a version from 2008 or earlier. Port Consistency: u232 p9 driver windows 10

    • Disable and Re-enable the Device: Disable the device in Device Manager, wait for 10 seconds, and re-enable it.
    • Uninstall and Reinstall the Driver: Uninstall the driver and reinstall it.
    • Check for Conflicting Devices: Check for conflicting devices in Device Manager and disable them if necessary.

    Some users have successfully used the driver package for the MCT U232-P9 hosted by Daktronics as a workaround for 64-bit systems. Manual Installation (The "Downgrade" Method): Right-click the Start button and select Device Manager. Here’s a helpful guide for installing and troubleshooting

    Alternative for 64-bit Systems: If you have trouble with standard installers, users often find success using the "U232_10.2.zip" package, which has been verified to work in 64-bit environments. Download Zadig (zadig