Error 0x8813021D

Value: -2012020195 | 0x8813021D | 2282947101

What does it mean ?

E_SB_PROV_VM_SYSPREP_SPECIALIZE_INCOMPLETE  
Timed out waiting for SysPrep specialize to be complete.
Value: 541 | 0x021D | 0b0000001000011101

Where does it come from ?

FACILITY_SB  
Session Broker TSV (Terminal Services VmHostAgent)
Value: 2067 | 0x813 | 0b100000010011

Other Errors for FACILITY_SB