The ASUS USB BT400 is a compact USB Bluetooth adapter, not a printer, and its driver helps Windows recognize the adapter and communicate with compatible wireless devices. Installing the appropriate ASUS driver can help resolve detection or pairing problems with Bluetooth peripherals such as mice, keyboards, headsets, and speakers.

Key Features

• Bluetooth adapter recognition: Provides the software Windows needs to identify the ASUS USB BT400 and use its Bluetooth functions.
• Wireless peripheral connectivity: Enables pairing with supported Bluetooth accessories, with available features depending on the accessory and Windows version.
• Windows Bluetooth integration: Works with Windows Bluetooth controls so you can discover devices, manage connections, and remove previously paired accessories.
• Troubleshooting support: Reinstalling a compatible driver may resolve missing-adapter errors or connection issues caused by damaged or mismatched driver files.

How to Install

1. Check your Windows version. Confirm whether your computer runs Windows 11, 10, 8, or 7, and check its system type where applicable. Review the download’s compatibility details before proceeding; do not assume every ASUS USB BT400 driver package supports all four versions.

1. Download the matching driver. Choose a package specifically intended for the ASUS USB BT400 and your operating system. If the download is compressed, extract its contents to an accessible folder.

1. Run the installer. Open the setup file and approve the administrator permission prompt if requested. Follow the on-screen instructions, including any directions about when to connect the adapter.

1. Connect the adapter and finish setup. Insert the USB BT400 into an available USB port when prompted. Allow installation to complete, then restart your computer if the installer requests it.

1. Pair and test a device. Open your Windows Bluetooth settings, enable Bluetooth, and place your accessory in pairing mode. Select it from the available devices and confirm that it works. If the adapter is not detected, check Device Manager for warnings and try another USB port before reinstalling the driver.

Common Issues and Fixes

• Install fails or rolls back: Run the ASUS USB-BT400 setup as administrator, temporarily disable antivirus/Windows SmartScreen, and install the package matching your Windows version/architecture. If setup still fails, unplug the adapter during installation, then reconnect it when prompted.
• Device not detected: Try a different USB 2.0/3.0 port directly on the PC, avoid hubs, and check Device Manager for unknown/USB devices. Remove any other Bluetooth adapter, then restart the Bluetooth Support Service and reconnect the BT400.
• Driver/version conflicts: Uninstall existing Bluetooth drivers and the generic Windows Bluetooth stack, select “Delete the driver software” in Device Manager, reboot, then install the ASUS/Broadcom package. If Windows Update overwrites it, roll back the driver or reinstall the ASUS version.