Enable Thunderbolt Adapter Preboot Modules (Disabled by default).

As long as the device remains connected, it continues to function within the operating system, regardless of the Security Level set in BIOS. What happens when this setting is enabled? Any Thunderbolt adapter peripherals and USB devices that are connected to the Thunderbolt adapter port before booting the computer can be used in preboot. However, setting this to 'Enabled' overrides the Security Levels used within the operating system. This allows Thunderbolt adapter peripheral devices and USB devices that are connected to the Thunderbolt adapter to be used during BIOS preboot.

When enabled, the following Thunderbolt adapter features are enabled during Preboot: Thunderbolt adapter boot support, USB device on Thunderbolt adapter support (including USB boot support).

Enable Thunderbolt Boot Support (Disabled by default).

When disabled, the Thunderbolt Technology feature is disabled, and any connected Thunderbolt adapter devices are not available in preboot or within the operating system.

When enabled, the Thunderbolt Technology feature and associated ports and adapters are enabled.

Enable Thunderbolt Technology Support (Enabled by default).

If Dell BIOS is used in your computer, you may find below Control options in Thunderbolt Configuration page in your BIOS Setup:

Click Details to view (Thunderbolt driver or firmware) version details.

Right-click the Thunderbolt Icon to view Thunderbolt Settings.

Right-click the Thunderbolt icon to View Attached Thunderbolt Devices.

An Authentication window appears for the user to select the connection setting.

The Thunderbolt icon appears in the system tray.

Connect the Thunderbolt Device to the computer.

Then you can attach the Thunderbolt 3 (USB-C) cable to the computer before using the docking station. After the driver update process completes, connect the AC adapter to the Dell WD22TB4 dock first.This is available in the ' Docks/Stands' section. Download and install the latest Dell Dock WD19/WD22 Series Firmware Update Utility for the docking station.Download and install the latest Realtek USB GBE Ethernet Controller Driver for the docking station.Download and install the latest Realtek USB Audio Driver for the docking station.This is available in the ' Video' section. Download and install the latest Intel or Nvidia or AMD graphics driver for the computer.This is available in the ' Chipset' section. Download and install the latest Intel Thunderbolt Controller Driver for the computer.NOTE: To learn more about updating the BIOS on a Dell computer, see the Dell knowledgebase article Dell BIOS Updates.

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