Error 0x8028001C

Value: -2144862180 | 0x8028001C | 2150105116

What does it mean ?

TPM_E_FAILEDSELFTEST  
The TPM hardware device reported a failure during its internal self test. Try restarting the computer to resolve the problem. If the problem continues, check for the latest BIOS or firmware update for your TPM hardware. Consult the computer manufacturer's documentation for instructions.
Value: 28 | 0x001C | 0b0000000000011100

Where does it come from ?

FACILITY_INK  
Microsoft Tablet PC
Value: 40 | 0x028 | 0b00101000

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