Note the (e.g., COM3) assigned to the device; you will need this in your specific software (like PuTTY or radio programming tools). Troubleshooting
Released around 2012–2014, version 3.3.2.105 was significant because it worked reliably on systems, bridging the gap between older hardware and newer OS versions. It was one of the last drivers before Prolific began actively blocking counterfeit chips (many low-cost adapters used cloned PL-2303 HX/HXA/EA chips) in later driver releases. prolific 3.3.2.105
Many users seek out this specific version (3.3.2.105) to resolve the error. This error occurs when Windows automatically installs a newer driver that intentionally disables support for older or "counterfeit" Prolific chips. Reverting to 3.3.2.105 is a common workaround to restore device functionality. Note the (e
A quick breakdown of the driver profile highlights its structural compatibility: Characteristic Specification Detail Release Date October 27, 2008 INF File Name ser2pl.inf Supported Chipsets PL2303HXA, PL2303XA, PL2303HX, PL2303X Target OS Architecture Windows 7, 8, 8.1, 10, and 11 (x86 & x64) Primary Function USB-to-Serial Comm Port Emulation ( COM/LPT ) Step-by-Step Installation Guide Many users seek out this specific version (3
Modern Prolific drivers (v3.4 and later) include a check that intentionally disables older "End of Life" (EOL) chips and counterfeit/clone chips. When these chips are detected, the driver throws an error in Device Manager. Version predates these security checks, allowing these older or "fake" chips to function normally on newer operating systems like Windows 10 and 11. Key Use Cases
It was released before Prolific implemented strict hardware validation checks that disable non-original chips.