Given the difficulty in sourcing "exclusive" drivers and the prevalence of fake chips, it is recommended to retire the U232-P9 in favor of adapters using the FTDI FT232 chipset. FTDI drivers are universally maintained, digitally signed for all current Windows builds, and do not suffer from the counterfeit detection lockout issues affecting Prolific/U232-P9 devices.
Given the difficulty in sourcing "exclusive" drivers and the prevalence of fake chips, it is recommended to retire the U232-P9 in favor of adapters using the FTDI FT232 chipset. FTDI drivers are universally maintained, digitally signed for all current Windows builds, and do not suffer from the counterfeit detection lockout issues affecting Prolific/U232-P9 devices.