Windows will automatically try to update your driver to the broken version. Follow these steps precisely to install version 3.2.0.0 and lock it in place. Step 1: Download the Driver Installer
For advanced users on Windows Home or Pro, you can prevent Windows from updating drivers for specific hardware IDs via the Registry or Group Policy Editor ("Device Installation Restrictions"). This ensures your working 3.2.0.0 setup remains permanent. Summary Checklist for Troubleshooting Root Cause Direct Fix Windows installed a driver newer than v3.3.2 Force downgrade to v3.2.0.0 Driver reverts on reboot Windows Update active Use "Roll Back Driver" tool No COM Port listed Bad USB port or dead cable Switch to a USB 2.0 port prolific+usb+to+serial+comm+port+version+32+00+download+2021
: If the error persists after installation, ensure you have physically unplugged and replugged the USB device. Windows will automatically try to update your driver
Disclaimer: This article is for informational purposes. Driver versions and availability are subject to change by Prolific Technology Inc. This ensures your working 3
When modern Windows Update tools push newer drivers, your hardware will instantly break, throwing an exclamation mark and a Code 10 error in your system configuration panel.
Right-click the downloaded installer and select .