Right-click on 'Prolific.' device in Device Manager and click on 'Properties'.

Verify RS232 device is connected to COM PORT number between 1 to 4.

If install STILL failed to install the drivers or above 'Prolific.' device has a yellow triangle next to it, then: Install the driver file from the disc that came with the RS232 Device. Windows Vista/7/8/10:Ĭontrol Panel » System » Device Manager Windows XP:Ĭontrol Panel » System » 'Hardware' tab » Device Manager You can verify a correct install going to Device Manager.

This time Windows will auto-install the drivers. So you have to install drivers manually.ġ) Disconnect RS232 device from your computer.Ĥ) Connect RS232 device into any USB port. However in 95% of cases, it will fail to automatically install the drivers. If it's successful, skip to Step 2 below. Allow 20+- seconds for Windows to attempt to install drivers automatically. Here's how.Ĭonnect RS232 device into any USB port on your laptop/computer. When you buy it, you'll need to install it to Windows-based computer. So all you need to get is a RS232-to-USB converter. Modern computers no longer have RS232 port (extinct just like VGA port is). RS232 was the universal/popular port back in the old days just like USB is today. This port was used on old computers before 2003. Some devices will only connect to your computer using a port called 'RS232 Serial Port'.

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