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Click and select a reason (e.g., "Previous version worked better"). Windows will remember this preference and stop updating this specific device. Method B: Use the Windows Show/Hide Updates Tool
As we have seen, the key is understanding the "why" behind the errors. The Code 10 error is rarely a sign of a broken device, but a symptom of a driver conflict. By employing the strategies outlined in this guide—from utilizing the official driver for newer chips to installing the legacy 3.3.2.102 driver and disabling signature enforcement as a last resort—you can successfully revive your adapter and restore reliable serial communication on your Windows 10 system. With patience and the right method, your U232-P9 can continue to serve its purpose for many years to come.
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 or adapters using FTDI chipsets generally offer much better native support for Windows 10 and 11. USB-Serial Adaptor - Microsoft Q&A
. While officially discontinued, it can still work on Windows 10 by using specific MCT drivers or "workaround" drivers from compatible devices like the Belkin F5U409 Go to product viewer dialog for this item. u232 p9 driver windows 10
Right-click the problem device in and select Update Driver . Click Browse my computer for drivers .
If your adapter is genuine, always use the official signed driver.
After installation:
To avoid hardware compatibility conflicts, follow this specific installation sequence rather than letting Windows automatically select the driver. Step 1: Download the Verified Driver Pack Disconnect the U232 P9 USB cable from your computer.
However, for production environments or peace of mind, invest in an FTDI-based adapter. It will work out of the box, survive Windows feature updates, and never throw a mysterious Code 10 again.
The most reliable drivers for this specific chipset come from Magic Control Technology (MCT) , the original manufacturer of the U232-P9 chip. Official MCT Driver: Click and select a reason (e
Prolific has officially declared several older PL2303 chip variants (like the and PL2303XA ) as End of Life (EOL). The company no longer provides official driver updates for them, and newer drivers explicitly drop support. If your adapter uses one of these legacy chips, Windows 10 may display a message like "PL2303HXA phased out since 2012" as soon as you plug it in, indicating that the hardware itself is no longer supported by modern drivers.
You will need a driver specifically designed for Windows 10. While some users have luck with newer drivers, sometimes a "Prolific USB-to-Serial Fix" is needed.
