U232 P9 Driver Windows 10

Below are three proven methods. Try Method 1 first – it works for about 70% of users. If not, proceed to Method 2.

After installation:

  • Advanced → COM Port Number: change to COM1–COM4 if needed for legacy software.

    • ⚠️ Important: Do not use Windows Update or generic Prolific drivers – they deliberately disable older chips to prevent crashes. u232 p9 driver windows 10

    Meta Description: Struggling to connect your U232 P9 USB to Serial adapter on Windows 10? This guide covers driver download links, step-by-step installation, error fixes (Code 10, Code 31), and legacy COM port settings. Below are three proven methods

    A: Avoid sites like driverdr.com or driveridentifier.com. They often bundle malware or outdated, broken drivers. Stick to Prolific’s official site or Microsoft Update Catalog. Advanced → COM Port Number: change to COM1–COM4

  • Disable driver signature enforcement (temporary):
  • Install legacy driver manually:
  • Ignore any compatibility warning – install anyway.