Right-click on "Prolific." device in Device Manager and click on "Properties".
This will cause Windows to attempt to re-read the device if it was unplugged for a period of time. Unplug the device and wait five seconds, then plug the device back in.
Verify RS232 device is connected to COM PORT number between 1 to 4. Method 1Method 1 of 2:Verifying Driver Installation and USB Devices Download Article.
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. Your computer will then recognize the USB device if the issue occurred because the currently loaded USB driver has become unstable or corrupted. Restart your PC and your USB controllers will be automatically re-installed. Some devices will only connect to your computer using a port called "RS232 Serial Port". Right-click a device and select Uninstall.