Official support for this specific version has been phased out by Prolific, but it is available via reputable hardware manufacturer archives:
: It works across Windows 7, 8, 10, and even Windows 11, provided the automatic update feature is managed. Key Technical Specifications Driver Version: 3.3.3.114 Release Date: Circa 2009–2010 Supported Chips: PL-2303 H, HX, HXD, EA, RA, SA, TA, TB. prolific usbtoserial comm port version 333114 driver
, use pnputil or Group Policy to block driver updates for VID_067B&PID_2303. Official support for this specific version has been