How to Fix Prolific USB-to-Serial "Code 10" Errors (2021 Update)
If you are seeing a yellow warning triangle and a "This Device Cannot Start (Code 10)" error in your Device Manager, you likely have a PL2303-based adapter with a "phased out" or non-genuine chip. Modern Windows updates often automatically install the latest Prolific driver, which purposely disables older or counterfeit hardware.
The most reliable fix is to backdate your driver to version 3.2.0.0, which remains compatible with older hardware across Windows 7, 10, and 11. 1. Download Driver Version 3.2.0.0
Since this is an older legacy driver, you may need to source it from manufacturer support pages or community repositories like Miklor or VE7ED. prolific usb to serial comm port version 32 00 download 2021
File Name: Often labeled as PL2303_Prolific_GPS_AllInOne_1013.exe or simply Prolific 3.2.0.0.
Safety Tip: Always scan third-party downloads with antivirus software before running them. 2. Installation Steps Disconnect your USB-to-Serial adapter from the computer.
Run the installer for version 3.2.0.0 and follow the prompts until complete. How to Fix Prolific USB-to-Serial "Code 10" Errors
Plug in your adapter. If Windows automatically tries to "update" it to a broken version, proceed to the manual selection step below. 3. Manually Selecting the Legacy Driver
Even after installing, Windows may keep using the newer, non-working driver. You must force it to use the 3.2.0.0 version:
| Feature | v32.00 (2021) | v1100+ (2022–2024) | |---------|---------------|---------------------| | Supports PL-2303 HX/HXD | ✅ Yes | ❌ No (forced Code 10) | | Supports PL-2303 GC | ❌ No | ✅ Yes | | Supports Windows 11 | Partial (with unsigned driver hack) | Full | | Baud rate (max) | 6 Mbps | 12 Mbps | | Driver signing | SHA-1 (expired) | SHA-256 | Version 32
Verdict: If you have an older adapter, do not install v1100. It will brick your device virtually. Version 32.00 is your last safe harbor.
This device cannot start. (Code 10)If your adapter is blocked by v3.2.0.0:
pl2303 kernel driver supports nearly all clones and older chips without issues.Even with the correct version 32.00 driver, installation is not plug-and-play. Windows often automatically loads a newer, incompatible driver. Follow this exact process to force the 2021 driver.
If the official site redirects you to newer versions (e.g., v1100+), use the Internet Archive’s Wayback Machine to retrieve the Prolific product page from March 2021. Alternatively, reputable tech repositories like MajorGeeks or TechSpot host a verified copy under the name: Prolific USB-to-Serial Comm Port Driver 3.2.0.0 (32/64-bit).
Warning: Avoid any website that asks for a paid subscription or a "driver updater" tool. The driver is free.
www.prolific.com.tw/US/ShowProduct.aspx?p_id=225&pcid=41 (still the safest).