No cause information.
If you are looking for the Near Field Communication (NFC) or Smartcard driver for a computer, they are located under the "Security Category" on the Dell support website (Figure 1).
The name of the driver is Dell ControlVault Driver.
In the past, it has been located under Network or Communications.
Figure 1
For Windows 7 and Windows 8.1, the preferred solution is the installation of Dell Data Protection | Security Tools v1.5 released January 29, 2015 from Dell.com/Support/Drivers (This application may also be available using Dell Digital Delivery).
If you want to install the NFC or Smartcard driver without DDP|ST, then install the Dell ControlVault Driver Version 3.0.00040.30.7.027, A18 or newer for Windows 7 and Windows 8.1 from Dell.com/Support/Drivers.