Error 0x80100009

Value: -2146435063 | 0x80100009 | 2148532233

What does it mean ?

SCARD_E_UNKNOWN_READER  
The specified reader name is not recognized.
Value: 9 | 0x0009 | 0b0000000000001001

Where does it come from ?

FACILITY_SCARD  
Smart-card subsystem
Value: 16 | 0x010 | 0b00010000

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Other Errors for FACILITY_SCARD