ACR Port Devices Driver

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

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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.

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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  • The USB driver is outdated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

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
Devices

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.

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Important

This topic is for programmers. If you are a customer experiencing USB problems, see Troubleshoot common USB problems

This topic lists the Microsoft-provided drivers for the supported USB device classes.

  • Microsoft-provided drivers for USB-IF approved device classes.
  • For composite devices, use USB Generic Parent Driver (Usbccgp.sys) that creates physical device objects (PDOs) for each function.
  • For non-composite devices or a function of a composite device, use WinUSB (Winusb.sys).

If you are installing USB drivers: You do not need to download USB device class drivers. They are installed automatically. These drivers and their installation files are included in Windows. They are available in the WindowsSystem32DriverStoreFileRepository folder. The drivers are updated through Windows Update.

If you are writing a custom driver: Before writing a driver for your USB device, determine whether a Microsoft-provided driver meets the device requirements. If a Microsoft-provided driver is not available for the USB device class to which your device belongs, then consider using generic drivers, Winusb.sys or Usbccgp.sys. Write a driver only when necessary. More guidelines are included in Choosing a driver model for developing a USB client driver.

USB Device classes

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USB Device classes are categories of devices with similar characteristics and that perform common functions. Those classes and their specifications are defined by the USB-IF. Each device class is identified by USB-IF approved class, subclass, and protocol codes, all of which are provided by the IHV in device descriptors in the firmware. Microsoft provides in-box drivers for several of those device classes, called USB device class drivers. If a device that belongs to a supported device class is connected to a system, Windows automatically loads the class driver, and the device functions with no additional driver required.

Hardware vendors should not write drivers for the supported device classes. Windows class drivers might not support all of the features that are described in a class specification. If some of the device's capabilities are not implemented by the class driver, vendors should provide supplementary drivers that work in conjunction with the class driver to support the entire range of functionality provided by the device.

For general information about USB-IF approved device classes see the USB Common Class Specification

The current list of USB class specifications and class codes is documented in the USB-IF Defined Class Code List.

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Device setup classes

Windows categorizes devices by device setup classes, which indicate the functionality of the device.

Microsoft defines setup classes for most devices. IHVs and OEMs can define new device setup classes, but only if none of the existing classes apply. For more information, see System-Defined Device Setup Classes.

Two important device setup classes for USB devices are as follows:

Driver
  • USBDevice {88BAE032-5A81-49f0-BC3D-A4FF138216D6}: IHVs must use this class for custom devices that do not belong to another class. This class is not used for USB host controllers and hubs.

  • USB {36fc9e60-c465-11cf-8056-444553540000}: IHVs must not use this class for their custom devices. This is reserved for USB host controllers and USB hubs.

The device setup classes are different from USB device classes discussed earlier. For example, an audio device has a USB device class code of 01h in its descriptor. When connected to a system, Windows loads the Microsoft-provided class driver, Usbaudio.sys. In Device Manager, the device is shown under is Sound, video and game controllers, which indicates that the device setup class is Media.

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Microsoft-provided USB device class drivers

USB-IF class codeDevice setup classMicrosoft-provided driver and INFWindows supportDescription
Audio (01h)Media
{4d36e96c-e325-11ce-bfc1-08002be10318}
Usbaudio.sys

Wdma_usb.inf

Windows 10 for desktop editions (Home, Pro, Enterprise, and Education)
Windows 10 Mobile
Windows 8.1
Windows 8
Windows 7
Windows Server 2008
Windows Vista
Microsoft provides support for the USB audio device class by means of the Usbaudio.sys driver. For more information, see 'USBAudio Class System Driver' in Kernel-Mode WDM Audio Components. For more information about Windows audio support, see the Audio Device Technologies for Windows website.
Communications and CDC Control (02h)
Ports
{4D36E978-E325-11CE-BFC1-08002BE10318}
Usbser.sys
Usbser.inf
Windows 10 for desktop editions
Windows 10 Mobile
In Windows 10, a new INF, Usbser.inf, has been added that loads Usbser.sys automatically as the function driver.

For more information, see USB serial driver (Usbser.sys)

Modem
{4D36E96D-E325-11CE-BFC1-08002BE10318}

Note Supports Subclass 02h (ACM)

Usbser.sys
Custom INF that references mdmcpq.inf
Windows 10 for desktop editions
Windows 8.1
Windows 8
Windows 7
Windows Server 2008
Windows Vista
In Windows 8.1 and earlier versions, Usbser.sys is not automatically loaded. To load the driver, you need to write an INF that references the modem INF (mdmcpq.inf) and includes [Install] and [Needs] sections.

Starting with Windows Vista, you can enable CDC and Wireless Mobile CDC (WMCDC) support by setting a registry value, as described in Support for the Wireless Mobile Communication Device Class.

When CDC support is enabled, the USB Common Class Generic Parent Driver enumerates interface collections that correspond to CDC and WMCDC Control Models, and assigns physical device objects (PDO) to these collections.

Net
{4d36e972-e325-11ce-bfc1-08002be10318}
Note Supports Subclass 0Eh (MBIM)
wmbclass.sys
Netwmbclass.inf
Windows 10 for desktop editions
Windows 8.1
Windows 8
Starting in Windows 8, Microsoft provides the wmbclass.sys driver, for mobile broadband devices. See, MB Interface Model.
HID (Human Interface Device) (03h)HIDClass
{745a17a0-74d3-11d0-b6fe-00a0c90f57da}
Hidclass.sys
Hidusb.sys
Input.inf
Windows 10 for desktop editions
Windows 10 Mobile
Windows 8.1
Windows 8
Windows 7
Windows Server 2008
Windows Vista
Microsoft provides the HID class driver (Hidclass.sys) and the miniclass driver (Hidusb.sys) to operate devices that comply with the USB HID Standard. For more information, see HID Architecture and Minidrivers and the HID class driver. For further information about Windows support for input hardware, see the Input and HID - Architecture and Driver Support website.
Physical (05h)---Recommended driver: WinUSB (Winusb.sys)
Image (06h)Image
{6bdd1fc6-810f-11d0-bec7-08002be2092f}
Usbscan.sys
Sti.inf
Windows 10 for desktop editions
Windows 8.1
Windows 8
Windows 7
Windows Server 2008
Windows Vista
Microsoft provides the Usbscan.sys driver that manages USB digital cameras and scanners for Windows XP and later operating systems. This driver implements the USB component of the Windows Imaging Architecture (WIA). For more information about WIA, see Windows Image Acquisition Drivers and the Windows Imaging Component website. For a description of the role that Usbscan.sys plays in the WIA, see WIA Core Components.
Printer (07h)USB

Note Usbprint.sys enumerates printer devices under the device set up class: Printer

{4d36e979-e325-11ce-bfc1-08002be10318}.

Usbprint.sys
Usbprint.inf
Windows 10 for desktop editions
Windows 8.1
Windows 8
Windows 7
Windows Server 2008
Windows Vista
Microsoft provides the Usbprint.sys class driver that manages USB printers. For information about implementation of the printer class in Windows, see the Printing - Architecture and Driver Support website.
Mass Storage (08h)
USBUsbstor.sysWindows 10 for desktop editions
Windows 10 Mobile
Windows 8.1
Windows 8
Windows 7
Windows Server 2008
Windows Vista
Microsoft provides the Usbstor.sys port driver to manage USB mass storage devices with Microsoft's native storage class drivers. For an example device stack that is managed by this driver, see Device Object Example for a USB Mass Storage Device. For information about Windows storage support, see the Storage Technologies website.
SCSIAdapter

{4d36e97b-e325-11ce-bfc1-08002be10318}

SubClass (06) and Protocol (62)
Uaspstor.sys
Uaspstor.inf
Windows 10 for desktop editions
Windows 10 Mobile
Windows 8.1
Windows 8
Uaspstor.sys is the class driver for SuperSpeed USB devices that support bulk stream endpoints. For more information see:
Hub (09h)USB

{36fc9e60-c465-11cf-8056-444553540000}

Usbhub.sys
Usb.inf
Windows 10 for desktop editions
Windows 10 Mobile
Windows 8.1
Windows 8
Windows 7
Windows Server 2008
Windows Vista
Microsoft provides the Usbhub.sys driver for managing USB hubs. For more information about the relationship between the hub class driver and the USB stack, see USB host-side drivers in Windows.
Usbhub3.sys
Usbhub3.inf
Windows 10 for desktop editions
Windows 8.1
Windows 8
Microsoft provides the Usbhub3.sys driver for managing SuperSpeed (USB 3.0) USB hubs.

The driver is loaded when a SuperSpeed hub is attached to an xHCI controller. See USB host-side drivers in Windows.

CDC-Data (0Ah)---Recommended driver: WinUSB (Winusb.sys)
Smart Card (0Bh)SmartCardReader

{50dd5230-ba8a-11d1-bf5d-0000f805f530}

Usbccid.sys (Obsolete)Windows 10 for desktop editions
Windows 7
Windows Server 2008
Windows Vista
Microsoft provides the Usbccid.sys mini-class driver to manage USB smart card readers. For more information about smart card drivers in Windows, see Smart Card Design Guide.

Note that for Windows Server 2003, Windows XP, and Windows 2000, special instructions are required for loading this driver because it might have been released later than the operating system.

Note Usbccid.sys driver has been replaced by UMDF driver, WUDFUsbccidDriver.dll.

WUDFUsbccidDriver.dll
WUDFUsbccidDriver.inf
Windows 8.1
Windows 8
WUDFUsbccidDriver.dll is a user-mode driver for USB CCID Smart Card Reader devices.
Content Security (0Dh)---Recommended driver: USB Generic Parent Driver (Usbccgp.sys). Some content security functionality is implemented in Usbccgp.sys. See Content Security Features in Usbccgp.sys.
Video (0Eh)Image
{6bdd1fc6-810f-11d0-bec7-08002be2092f}
Usbvideo.sys

Usbvideo.inf

Windows 10 for desktop editions

Windows Vista

Microsoft provides USB video class support by means of the Usbvideo.sys driver. For more information, see 'USB Video Class Driver' under AVStream Minidrivers.

Note that for Windows XP, special instructions are required for loading this driver because it might have been released later than the operating system.

Personal Healthcare (0Fh)---Recommended driver: WinUSB (Winusb.sys)
Audio/Video Devices (10h)----
Diagnostic Device (DCh)---Recommended driver: WinUSB (Winusb.sys)
Wireless Controller (E0h)

Note Supports Subclass 01h and Protocol 01h

Bluetooth

{e0cbf06c-cd8b-4647-bb8a-263b43f0f974}

Bthusb.sys

Bth.inf

Windows 10 for desktop editions
Windows 10 Mobile
Windows 8.1
Windows 8
Windows 7
Windows Vista
Microsoft provides the Bthusb.sys miniport driver to manage USB Bluetooth radios. For more information, see Bluetooth Design Guide.
Miscellaneous (EFh)Net

{4d36e972-e325-11ce-bfc1-08002be10318}

Note Supports SubClass 04h and Protocol 01h

Rndismp.sys
Rndismp.inf
Windows 10 for desktop editions
Windows 8.1
Windows 8
Windows 7
Windows Vista
Prior to Windows Vista, support for CDC is limited to the RNDIS-specific implementation of the Abstract Control Model (ACM) with a vendor-unique protocol (bInterfaceProtocol) value of 0xFF. The RNDIS facility centers the management of all 802-style network cards in a single class driver, Rndismp.sys. For a detailed discussion of remote NDIS, see Overview of Remote NDIS. The mapping of remote NDIS to USB is implemented in the Usb8023.sys driver. For further information about networking support in Windows, see the Networking and Wireless Technologies website.
Application Specific (FEh)---Recommended driver: WinUSB (Winusb.sys)
Vendor Specific (FFh)--Windows 10 for desktop editions
Windows 10 Mobile
Recommended driver: WinUSB (Winusb.sys)

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