For newer Windows 11 systems, some users have found success with version 3.8.38.2 if 3.2.0.0 absolutely fails, though 3.2.0.0 is better for old PL2303HXA/XA chips.
Prolific officially announced that chips older than the PL-2303 HXD (Rev D) would no longer receive updates beyond version 32.00. Users needing to run these chips on Windows 10/11 were advised to either revert to an older Windows version or use this specific 2021 driver package.
What (telescope, router, radio) are you connecting? prolific usb to serial comm port version 32 00 download 2021
Keep your serial ports alive. Long live RS-232.
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Known issues (circa 2021)
Download Prolific USB to Serial Comm Port Version 3.2.0.0 (2021/2026 Guide) What (telescope, router, radio) are you connecting
: Version 3.2.0.0 (originally released around 2007–2008) does not include these hardware-disabling checks, allowing older and cloned hardware to function normally on Windows 10 and 11. Where to Download (2021/2022 Sources)
: After successfully installing version 3.2.0.0, open Device Manager, right-click the "Prolific USB-to-Serial Comm Port" entry, select "Properties," go to the "Driver" tab, and click "Roll Back Driver" if the button is enabled. This tells Windows that you prefer the current driver. Additionally, in Windows Settings, navigate to "System" → "About" → "Advanced system settings" → "Hardware" → "Device Installation Settings," and select "No" when asked whether to automatically download drivers. This setting reduces the likelihood of automatic overwrites.
Right-click your Prolific device (often marked with a yellow warning triangle). Click .
Save the v3.2.0.0 installer (often available from specialty hardware sites like ) to a new folder. Disconnect the Device: