The reader drivers must be fully updated to support the PC/SC (Personal Computer/Smart Card) standard. Critical Prerequisites

The is the core cryptographic driver included within the Instalador Tarjetas DNIe (v1.2.0) module released by Spain’s National Police (Policía Nacional) . Distributed automatically via Microsoft Windows Update , this software update serves as the vital bridge between your computer's operating system, your physical smart card reader, and your Electronic Identity Document (DNIe).