READ THIS IF YOU USE WIN8

READ THIS IF YOU USE WIN8
PL2303HXA/XA Windows 8 Update Driver Installation
How to Update Driver to Support PL2303HXA/XA
in Windows 8 Operating Systems
Requirements

USB Device with embedded PL2303HX (Rev A) or PL2303X (Rev A) chip version

Driver Installer & Build date: 1.5.0 (10/21/2011)

Windows Vista/7 (32 & 64-bit) Driver: v3.4.25.218 (Compatible with Windows 8)
What You Need to Know About PL2303HXA/XA in Windows 8

PL2303HXA/XA has already discontinued (EOL) and will not be supported in Windows 8
with the new PL-2303 Windows 8 WHQL driver (Installer v1.7.0 and above). The
PL2303HXA/XA device will not install properly and will show a yellow mark (Error Code 10)
in Windows 8 Device Manager. Windows 8 will also automatically download the latest
driver using Windows Update if the computer has an Internet connection.

The workaround solution is to manually roll-back the latest driver to an older driver version
(Driver Installer v1.5.0 & Driver v3.4.25.218) that is compatible with the PL2303HXA/XA in
Windows 8. You would also need to turn off Windows Update to make sure Windows does
not automatically update the driver again. (Windows Update is enabled by default.)

Note that Prolific has also discontinued technical support for PL2303HXA/XA chip versions.
So the old driver workaround is AS IS and will not be provided support.
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PL2303HXA/XA Windows 8 Update Driver Installation
How to Update or Roll-Back the Driver for PL2303HXA/XA in Windows 8
1.
Unplug first the USB device (PL2303HXA/XA). Power on your computer and boot to Windows 8.
If you have installed the latest PL2303 Windows Driver Installer program, you will need to
uninstall or remove it first from Control Panel.
2.
Press Start button and type “Control Panel”. Click Control Panel when found.
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PL2303HXA/XA Windows 8 Update Driver Installation
Or open Explorer folder and pull down folder menu to look for Control Panel.
3.
Click Uninstall a program under Control Panel-Programs.
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PL2303HXA/XA Windows 8 Update Driver Installation
4.
Check if “PL-2303 USB-to-Serial” (version 1.7.0) is installed. Click Uninstall to remove the driver.
5.
Run or double-click the PL-2303 Windows Driver Installer v1.5.0 program. Do not plug-in the
USB device yet. Unplug the device from the USB port before running the driver installation.
6.
The InstallShield Wizard will be displayed to inform you that the PL-2303 USB-to-Serial driver
will be installed on your computer. Click Next to continue.
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PL2303HXA/XA Windows 8 Update Driver Installation
7.
The PL-2303 Driver Installer program will then start to install the drivers needed. Click the Finish
button to close the InstallShield program.
8.
Go to Control Panel-Programs again. Click Uninstall a program under Programs. Now check if
“PL-2303 USB-to-Serial” (v1.5.0) is installed.
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PL2303HXA/XA Windows 8 Update Driver Installation
9.
Go to Device Manager. Press Start button and type “Device Manager” and click Settings to find
Device Manager. Or right-click Properties My Computer to go to Device Manager.
10.
Plug-in the USB device (PL2303HXA/XA) to the USB port. If the PC is connected to the Internet,
Windows will first check Windows Update for new driver available. It will download the new driver
instead which is not compatible with PL2303HXA/XA and will show a yellow mark (error code 10)
for “Prolific USB-to-Serial Comm Port” in Device Manager.
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PL2303HXA/XA Windows 8 Update Driver Installation
11.
To roll-back the driver to the compatible old driver version, right-click “Prolific USB-to-Serial
Comm Port” and click “Update Driver Software…”
12.
Click “Browse my computer for driver software” to locate and install driver software manually.
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PL2303HXA/XA Windows 8 Update Driver Installation
13.
Because the old driver has already been installed, you just click the bottom option “Let me pick
from a list of device drivers on my computer” to show the list of installed driver software
compatible with the device.
14.
From the list of installed drivers, look for the driver version 3.4.25.218 [10/7/2011], click it to
select and click Next to continue.
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PL2303HXA/XA Windows 8 Update Driver Installation
15.
Windows will then install the old driver back to the system.
16.
Wait until Windows has successfully updated your driver software. Click Close when finished.
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PL2303HXA/XA Windows 8 Update Driver Installation
17.
You will now see the “Prolific USB-to-Serial Comm Port” is installed properly. Right-click
Properties the device again to confirm the driver version is the old compatible version.
18.
You may now run your software and set the assigned COM port number.
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PL2303HXA/XA Windows 8 Update Driver Installation
How to Turn-Off Windows Update
To make sure Windows does not update the driver to a newer version, you will need to disable
Windows Update. Note, however, that would affect all devices driver updates. If you want to run
Windows Update, you would need to unplug the USB PL2303HXA/XA device first.
1.
Right-click Properties My Computer. Click Advanced system settings.
2.
Click Hardware tab, and Device Installation Settings.
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PL2303HXA/XA Windows 8 Update Driver Installation
3.
Click “No, let me choose what to do” and click “Never installed driver software from Windows
Update.” Click Save Changes.
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