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Drivers for Prolific USB to serial converters
This download is not a set of driver files, but an installer program that installs the driver automatically.
Please be sure to follow this sequence:-
1. Disconnect the USB to Serial Converter.
2. Download and run this installer.
3. Restart Windows if requested.
4. Connect the USB to Serial Converter.
The driver for the newer type is available here.
Windows 10 users: Microsoft Edge or Windows Smartscreen may tell you that the security certificate for the downloaded file is corrupt or invalid. Please do not be alarmed: the download is safe. Examining the downloaded file with File Explorer will show that the certificate is ok.
If your browser is out of date, it may fail to detect a newer type of security certificate and wrongly advise you that there is a problem with the downloaded file’s certificate.
If the driver installer doesn’t work, please try the alternative driver. This is a set of driver files that must first be unzipped into a new folder.