Thunderbolt
Definition
A high-bandwidth interconnect tunneling PCIe and DisplayPort.
Detailed explanation
Thunderbolt is a high-bandwidth interconnect that tunnels PCIe and DisplayPort over a cable. Thunderbolt 3 and 4 use the USB-C connector shape, but a USB-C receptacle does not necessarily support Thunderbolt. Controllers, authorization policy, cable capability, docks, and connected PCIe devices form a layered topology. Security levels can require device authorization because tunneled PCIe offers memory-capable peripherals a path into the host. USB4 shares important tunneling concepts, but certification, minimum features, cable markings, and optional capabilities mean the two names are not universally interchangeable.
Where you are likely to see it
This term usually appears in Device Manager, Windows recovery tools, Event Viewer, or the installation details for a device package. The definition above gives the short meaning; the detailed explanation describes the term's role in the operating system and hardware stack.
Device status, hardware IDs, and event text identify which Windows subsystem produced a label. This glossary is informational and does not provide repair, installation, or technical-support services.
Related vocabulary
Explore connected concepts and nearby entries in the Windows hardware vocabulary.
- WHQLWindows Hardware Quality Labs, Microsoft’s certification program for drivers.
- INF FileA Setup Information file that declares package installation and hardware support.
- TPMTrusted Platform Module, a protected cryptographic and measurement component.
- UEFIUnified Extensible Firmware Interface, the modern PC firmware standard.