is a widely used USB-to-Serial (RS232) adapter chip commonly found in devices like the Belkin F5U409
Code 10 Error: If you see "This device cannot start (Code 10)," it often means the driver is too new for an older Prolific chip. You may need to manually downgrade the driver to an older version (like 3.3.2.102) to get it to work.
If your computer identifies the device as an MCT or Belkin adapter, use the drivers provided by Magic Control Technology (MCT). u232 p9 driver windows 10
If the U232-P9 continues to fail, the hardware itself might be a "clone" or simply too old for modern 64-bit architecture security. Modern alternatives like the Moxa UPort 1100 or adapters using FTDI chipsets generally offer much better native support for Windows 10 and 11. USB-Serial Adaptor - Microsoft Q&A
The U232-P9 is a common model name for USB to RS-232 (DB9) serial adapters. Depending on your specific brand (like Belkin or generic manufacturers), it likely uses one of two chipsets: is a widely used USB-to-Serial (RS232) adapter chip
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 They often bundle malware or outdated, broken drivers.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.
The core issue is that Windows 10 often installs a generic or modern Prolific driver that is incompatible with the older U232-P9 chipset, frequently resulting in a "Code 10: This device cannot start" error in the Device Manager. Solutions for Windows 10 Real-time Data Graphing : Offer a real-time graphing
Verify: Open Device Manager again. The adapter should now appear under Ports (COM & LPT) as a "USB Serial Port" with an assigned COM number (e.g., COM3).