Drivers DTC Port Devices

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

If your device belongs to the Communications and CDC Control device class, Usbser.sys is loaded automatically.You do not need to write your own INF to reference the driver. The driver is loaded based on a compatible ID match similar to other USB device class drivers included in Windows. USB Class02&SubClass02. Connect a USB 3.0 flash drive (USB Mass Storage Device) to one of the Intel USB 3.0 ports. In Device Manager, click View, and click Devices by connection. In Devices by connection view, you can easily see the USB Mass Storage device under the Intel® USB 3.0 eXtensible Host Controller category. To verify that your driver is working, you should see a difference in the following pictures after plugging the CH340 to a USB port. To check that the CH340 enumerates to a COM port, you can open the device manager. You can click the Start or ⊞ (Windows) button and type 'device manager to quickly search for the application.

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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

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  • The USB driver is outdated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

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Drivers DTC Port Devices

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

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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

Drivers DTC Port Devices

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Category: Network and Modem
Manufacturer: DTC Inc.
Caution Level: Intermediate
Download File Size: 13.79 Mb
Operating System: Windows XP, Windows 2000, Vista
Latest Version / Release Date: V.3.6 / 06 Apr 2003

Windows device driver information for DTC PCI Parallel Port

These are drivers for a DTC PCI Parallel Port adapter. They can be downloaded from the manufactures website if not issued with purchase of the device. With proper installation, the user is assured of complete output satisfaction and task accomplishment. It is credited for its superb performance including high networking speeds of up to 1.5Mbs double speed. It operates on a 24-bit bus mode. The data transmission is fast making the device applicable in large workgroup networks. The fast data speeds reduce the CPU loading capacities making the networked computers operate at high speeds with little or not data delays. This makes the DTC PCI Parallel Port adapter quite reliable in terms of data accuracy and transfer speeds. There is also security installations issued with purchase of the device. The security software protects the data being transferred from getting to the wrong hands.

Outdated Drivers?

Unless you update your drivers regularly you may face hardware performance issues.

To check your drivers you should manually verify every device on your system for driver updates

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The DTC PCI Parallel Port is quite compatible with several servers and supports most of the common operating systems such as Windows, Linux and NetWare among others. It enables one access data stored in various format such as music, photos, files and emails. It also gives one fast and reliable access to the internet. It is a plug and play device in some operating systems although one might have to install the driver software when using other types of operating systems. This makes it compatible with IRQ sharing features to guarantee convenience to the user. It also is incorporated with temporary storage area that buffers information to sustain the speed at which data is being transferred. After purchase of the DTC PCI Parallel Port device, the user is issued with a one year warranty that enables one to get the device repaired or replaced just in case it has mechanical problems. It is highly recommended you run a free registry scan for Windows and DTC PCI Parallel Port errors before installing any driver updates.