This article describes an issue that occurs when you use a FireWire port-based device in Windows 8.1 or Windows 8. Additional steps of configuration is required to enable this update after the installation.

Symptoms

On Windows 10, a device driver is an essential piece of code, which allows the system to interact with a specific hardware (such as graphics card, storage driver, network adapter, Bluetooth, etc.). If you have to manually install a driver for the device — perhaps the driver is already installed on your system — you can use the Update Driver button in the device’s Properties window. If the device driver is already installed on your system, click the “Browse my computer for driver software” link and choose an installed driver.

Assume that you have a computer that equips with an IEEE 1394 FireWire controller card. After you upgrade the computer from Windows 7 to Windows 8.1 or Windows 8, devices that connect to the computer by using a FireWire port do not work.

The reason is that after a Windows 10 update, virtual COM port drivers may not load any-longer by default for devices of some types. Dedicated app: virtual COM port driver for Windows 10 If ports COM & LPT are not shown in the Device Manager of your Windows 10 system, you can install Virtual COM Port Driver and solve this problem once and for all. THREE: IDENTIFY COM PORT USED BY THE USB DEVICE Once the device and driver are installed, confirm which COM port is being used by the USB device. You must know which COM port is being used in order to correctly set up applications that interact with the USB device. Use the following steps to identify the COM port.

Cause

This issue occurs because the legacy 1394 bus drivers (1394bus.sys and Ochi1394.sys) are removed in Windows 8.1 or Windows 8.

Resolution

Update information

How to obtain this update

Microsoft Download Center

The following files are available for download from the Microsoft Download Center:

Operating system	Update
All supported x86-based versions of Windows 8.1 or of Windows 8
All supported x64-based versions of Windows 8.1 or of Windows 8

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Additional steps of configuration requirement

After you install the 1394 OHCI Legacy Driver.msi file, follow these steps:

Drivers Via Port Devices Terminal

Right-click the Legacy1394.inf file under one of the following paths based on the computer's architecture:
- C:Program Files1394 OHCI Compliant Host Controller (Legacy)x86_driver
- C:Program Files1394 OHCI Compliant Host Controller (Legacy)x64_driver
Click Install.
Open Device Manager in Control Panel.
Expand IEEE 1394 Bus host controllers, and then locate the host controller.
Right-click the host controller, and then click Update Driver Software.
The screen shot of the host controller and the Update Driver Software is listed in the following example:
Click Browse my computer for driver software.
Click Let me pick from a list of device drivers on my computer.
Click Generic1394 OHCI compliant host controller (Legacy), and then click the Next button.
Click the Close button.

Prerequisites

There are no prerequisites for installing this update.

Registry information

To apply this update, you do not have to make any changes to the registry.

Restart requirement

You have to restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 8.1 and Windows 8 file information notesThe MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are not listed

For all supported x86-based versions of Windows 8.1 or of Windows 8

File name	File version	File size	Date	Time	Platform
1394_ohci_legacydriver.msi	Not Applicable	208,896	15-Aug-2014	20:48	Not Applicable

For all supported x86-based versions of Windows 8.1 or of Windows 8

File name	File version	File size	Date	Time	Platform
1394_ohci_legacydriver.msi	Not Applicable	208,896	15-Aug-2014	20:48	Not Applicable

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the 'Applies to' section.

More Information

Steps of uninstalling the 1394 OHCI Legacy Driver.msi file

Open Control Panel in the Category view.
Click Uninstall a program in Control Panel.
Right-click 1394 OHCI Compliant Host Controller (Legacy), and then click Uninstall.
The screen shot of uninstalling the 1394 OHCI Compliant Host Controller (Legacy) is listed in the following example:

Additional package information

Drivers Via Port Devices Lucie

This driver is only intended to work with legacy 1394 host controllers. Therefore, you may experience lower transfer data rates than the 1394b driver.
The driver is intended to resolve compatibility issues for 1394 peripherals on 1394b systems. If you are not experiencing these issues, you should continue to use inbox drivers that are provided in Windows 8.1 or Windows 8.
You have to reinstall this stand-alone driver package if you upgrade to a newer operating system version in the future.

Drivers Via Port Devices Inc

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

Drivers Via Port Devices Gigabit

824684 Description of the standard terminology that is used to describe Microsoft software updates

Drivers VIA Port Devices