The Surface DTX driver is related to devices in Microsoft's Surface lineup, specifically those that utilize Surface Docking Station technology. The "DTX" part likely refers to Display Transport eXtension or a similar terminology used internally for Surface docking or display management features. It could be related to the Surface Dock or Surface Type Cover functionality, or a specific part of the Surface hardware used for external displays, docks, or peripherals.
The Surface DTX Windows driver would be responsible for ensuring that the Surface device correctly interfaces with peripherals such as docking stations, monitors, or other external devices that rely on specific transport protocols, such as DisplayPort, USB-C, or Thunderbolt (depending on the device).