Dec 21, 2020 • Filed to: USB Recovery • Proven solutions

Have you ever had difficulty connecting your devices to your computer using a Prolific USB to Serial adapter? If yes you are lucky to find this page, it will give you all the information need to fix an unresponsive Serial driver adapter. You may have noticed a yellow exclamation mark hovering over or beside the USB to Serial Driver when searching your Device Manager and if you have we can all agree that it signifies a prevailing problem.

Overview of the Error

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If you are not able to connect your device to your PC using a USB to Serial adapter it may be that

• The USB driver is outdated
• The USB Driver is missing
• Or even a corrupted driver

While you can't be so sure what the exact problem is there are solutions you can adopt to fix the issue once and for all. Read on to find quick fixes to resolve the problem.

1# Fix Prolific USB to Serial Driver not Working

Solution: Roll your Prolific USB to Serial Driver back to an older version

Updating your drivers often work wonders for your system because it makes sure that it runs on the latest features that guarantee maximum functionality. Unfortunately updating your drivers can cause this kind of error especially if your latest update does not work too well with your hardware. Once you upgrade your PC to the latest Windows version your Prolific USB to Serial Driver also updates to the latest driver software and if the driver is not compatible with your Hardware issues may arise. To correct the error, you will have to download the driver again by following these steps.

• Right-click on your PC Start button and open Device Manager

• Double click LPT and COM ports then locate the Prolific USB to Serial Driver and right-click it so you can select Update Driver

• For driver software click My computer

• From My computer select 'Let me pick from a list of drivers available'

• Choose an older version from the list then click Next

• The driver you selected will be installed automatically
• Once it has been downloaded reconnect the driver to see if it works.

2# Fix Prolific USB to Serial Driver 'Coder 10'

Driver issues reveal themselves in so many ways or through messages such as

• This device will not start (Code 10)
• There is no driver installed in this device
• The driver was not successfully installed

A code 10 error may arise because the chip you are using is not an original one. If you are using a fake, the manufacturer has a way of disabling it due to copy write infringement and the copy write takes effect once you download a recent update. To protect your PC from getting this code, you will have to make sure that your Windows 10 never updates a driver without approval. Updates come in the form of 64 bit and 32-bit drivers. Below we will show you how to work your way around the problem.

Window 64 bit Fix

To fix Windows 64 bit OS including Prolific USB to Serial Adapter, follow through these steps.

• Download 'PL2303_64bit_Installer.exe and Save
• Remove every USB to Serial adapter from your PC and double click the 'PL2303_64bit_installer.exe
• Follow the prompt by plugging in one USB to Serial adapter the click on Continue
• Reboot your PC to get Windows up and running

If you have followed these process through and you still see the same error go to your device manager

• Open the control panel and navigate to Device Manager
• From your control panel navigate to the System category and click the Hardware tab
• Scroll to the LPT/COM port and double click Prolific USB to Serial Comm Port
• Click Drivers in the Properties section
• The Driver you choose should read '3.3.2.102 with an appropriate date attached
• If the date is wrong then it means the wrong driver was installed
• Unplug the Serial adapter and run the steps again to install the correct driver

Window 32-bit

For Windows 32-bit OS systems follow these steps

• You will have to download the 'PL-2303_Driver_Installer.exe and save from Microsoft download link
• Run the program and eradicate the driver if you can
• Run the installer once more to install a correct driver

To Troubleshoot for error if your device still does not work

• Go to Control panel, enter System to access your Device Manager
• Scroll down to the LPT/ COM port then double click Prolific USB to Serial Comm Port
• Click Driver in the Windows Properties section
• The driver must be numbered as '2.0.2.8' and dates accordingly

If the driver was not installed, remove the Serial adapter then run 'PL2303_Driver_Installer.exe' again. Follow directions in Device Manager to download the correct driver

The three solutions listed in this article have proven to be quite helpful in fixing a Prolific USB to Serial driver not working on Windows 10. They may appear confusing at first but if you follow each step in detail you can resolve the issue.

Video Tutorial on How to Fix USB Device Not Recognized

USB Solution

Recover USB Drive

Format USB Drive

Fix/Repair USB Drive

Know USB Drive

*Only compatible with Windows Vista/7/8/10 OS (Does not operate on Mac OS)

This article includes all of the software downloads. Navigate through the tabs to select the software you need, click on the red 'Click here' link to download the program of your choice.

Device Updater

OS Requirements: Windows Vista/7/8/10

*Used to download updates for GTX, BDX, X4, Livewire, ITSX

Click hereto download the Device Updater.

Make sure all devices are unplugged during the install process.

Livelink Gen-II

OS Requirements: Windows Vista/7/8/10

*Datalogging software.

Download The Tova USB Devices Driver

Click hereto download Livelink Gen-II.

Make sure all devices are unplugged during the install process.

Advantage III

OS Requirements: Windows Vista/7/8/10

Click hereto download Advantage III.

Make sure all devices are unplugged during the install process.

Drivers

Download The Tova Usb Devices Driver Download

Windows 32bit drivers click here.

Windows 64bit drivers click here.

Install Instructions

If you installed the SCT device updater before you plugged the device in then this should be easy to fix.

With your device connected:

Open your computers Device Manager.

Look for a device that is not installed like one with a yellow exclamation mark. (Here is a screenshot of what you are looking for.)

If you see this, right click it and select update driver.

A new window should open up and give you the option to either automatically search, or browse for files.

Click browse for files

Navigate to the folder you downloaded, and select “Open”.

Download The Tova Usb Devices Drivers

If you did this correctly, it’ll tell you your drivers have successfully been updated and once you click “OK” you should see something similar to the picture below.

Now your communication should work between the device and the computer. With most devices, you will want to unplug it and plug it back in and restart the device updater. Then click “Display Device Settings and Serial” and if the serial number shows up, it is communicating.

Update Agent for GT's

How do I update my Bully Dog GT Tuner?

Basic Steps to Update a GT Tuner

1. Run the Update Agent.

2. Connect the Micro SD card to your computer.

3. Choose the vehicle application and let the Agent search.

4. Click the Update button.

5. When the Update is finished, put the Micro SD card in the GT.

6. Update the GT Platinum from the SD card by choosing Update GT Software, or Update GT Firmware on the Main Menu. (option will be all the way at the bottom of the main menu.)

Detailed Steps to Update a GT Tuner

Where do I Find the Bully Dog Light Duty Update Agent for a Bully Dog Gauge GT Tuner?

To install the Bully Dog Light Duty Update Agent please open the following link. Then open and run the file.

1. Open the update agent. Note: the tune will need to be uninstalled from your vehicle to update. You can check the vehicle is stock by going to show settings, the status will read “installed” or “not installed”
2. Connect the SD with either the card reader or the GT itself and the USB cable
3. Highlight the card in the update agent, and select “select device”

4. Select your device (40417, 40420, etc.) then select “download and upgrade”

5. Wait for the download to finish, you will see this message.

6. Select ok, then with the sd card in the device, go to change vehicle at the top of the menu, if it is the first time updating, and select your vehicle. Or go to update software at the bottom of the main menu to update with the latest files.

Download The Tova Usb Devices Driver Windows 7