Many users find success by rolling back to Version 3.3.2.102 or Version 3.3.11.152 .
If multiple versions appear, try a version dated around or 2013 (e.g., version 4.0.100.1190), as newer versions often fail on older hardware. Unsigned Driver Enforcement : u232 p9 driver windows 10
Here’s concise, actionable guidance for locating, installing, and troubleshooting a "U232 P9" USB-to-serial (FTDI/Prolific/SiLabs-style) driver on Windows 10. I assume you mean a USB RS232 adapter model often labeled U232 P9; steps below cover identification, driver sources, installation, and troubleshooting. Many users find success by rolling back to Version 3
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. actionable guidance for locating