The Microsoft OHCI-konformer 1394-Hostcontroller (alt) driver enables Windows to communicate with compatible IEEE 1394, or FireWire, host controllers. This legacy driver supports connections to FireWire peripherals such as digital video cameras, external storage devices, and audio interfaces, where compatible device software is also available.

Key Features

• Provides host-controller support for compatible OHCI-compliant IEEE 1394 hardware.
• Enables communication between Windows and connected FireWire devices for tasks such as video capture, audio recording, and file transfer.
• Offers a legacy driver option that may help with older peripherals or applications that do not work reliably with a newer 1394 driver stack.
• Integrates with Device Manager so you can check controller status, update the driver, or roll back a change when necessary.

How to Install

1. Confirm your hardware and Windows version. Open Device Manager and locate your controller under “IEEE 1394 Bus host controllers.” Check whether your system runs Windows 10, 8.1, 7, Vista, or XP, and whether it uses a 32-bit or 64-bit architecture.
2. Choose the matching driver package. Download the Microsoft driver intended for your exact Windows version and architecture. Legacy 1394 installation requirements vary between Windows releases; do not assume one package supports every listed system.
3. Prepare for the update. Close any software using FireWire equipment and safely disconnect attached storage devices. Extract the downloaded files if necessary, and follow any included setup instructions.
4. Install or select the driver. Run the supplied installer, if present. For a manual installation, right-click the controller in Device Manager, select the driver-update option, and browse to the extracted driver folder. Select a legacy controller entry only if it is available and compatible with your hardware.
5. Restart and test. Restart Windows if prompted, reconnect your equipment, and check that the controller has no warning icon in Device Manager. Test the device with its usual application.

The host-controller driver does not replace peripheral-specific drivers. Some FireWire audio interfaces and other specialized equipment require additional manufacturer software, even when the controller is working correctly.

Common Issues and Fixes

• Install fails or driver won’t start: The Microsoft OHCI 1394 host controller driver may conflict with older OEM FireWire drivers. Run the installer as administrator, use Device Manager > Update driver > Browse, and select the Microsoft OHCI-compliant 1394 driver for your Windows version.
• Device not detected: Reseat the PCI/PCIe 1394 card or check the laptop’s 1394 port in BIOS. In Device Manager, enable View > Show hidden devices and run Scan for hardware changes. Confirm the FireWire cable/device is powered.
• Version conflicts after Windows updates: Uninstall the existing 1394 host controller and its driver, reboot, and let Windows reinstall the inbox OHCI driver. Avoid mixing legacy third-party 1394 stacks with the Microsoft driver.