Windows Update frequently pushes the latest Prolific drivers (such as v3.8.x), which are incompatible with legacy PL2303 HXA/XA chips. Reverting to bypasses these hardware checks, allowing these older devices to function correctly on newer systems. How to Download and Install (2021-2024 Method)

Open Device Manager, right-click the Prolific device, select Properties , go to the Driver tab, and click Roll Back Driver . COM Port Number Conflict

While version 3.2.0.0 remains the most popular solution for Prolific PL2303 issues, it is not the only one. Several alternatives have emerged over the years.

In Device Manager Prolific Properties, go to Port Settings > Advanced . Change the COM Port Number dropdown menu to an open low number. Data Corruption or Random Disconnections

Click . Select the version labeled 3.2.0.0 and click Next. Troubleshooting Common Errors Error Code 10 (Device Cannot Start)