![]() Release Notes: - PL2303 Driver Installer v1.9.0 Installer & Build date: 1.9. VID_067B&PID_2303 for 'Prolific USB-to-Serial Comm Port' (PL2303 series). Windows 98 and ME driver support are discontinued. VID067B&PID2303 for Prolific USB-to-Serial Comm Port (PL2303 series). If the driver version is not 3.3.2.102 that works well with Windows 11 and 10, you may need to go to the Prolific official website. ![]() Under Driver, check whether the PL2303 driver version is 3.3.2.102. Download latest PL2303 CheckChipVersion tool program to check chip version in Windows 7. Locate LPT/COM > Prolific USB to Serial Comm Port, and then right click it to select Properties. Windows 8 and above OS are NOT supported in PL2303HXA/XA EOL chip versions (discontinued). Supports the following Windows OS Family: In Windows 8.1 and earlier versions of the operating system, Usbser.sys is not automatically loaded when a USB-to-serial device is attached to a computer. As expected, the operating system listed the hardware under Device Manager with an exclamation mark: Figure 1. Device using PL2303HXA/XA/HXD/EA/RA/SA/TA/TB version chips Make sure to download our Profilic Windows 8/8.1 圆4bit Drivers from our Administrative Tools section We took our old USB-to-Serial adapter and plugged it in our ultrabook running Windows 8.1. Device using PL-2303 H/HXA/HX/X version chips Driver Version: 2.0.2.8 Driver Date: 11/20/07 Supported device ID and product strings.
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