This is just out of curiosity - does anybody know what a table with 'WDTT' signature is? I see its presence, for instance, on Intel DG33TL: /* WDTT: Length=716, Revision=1, Checksum=38, OEMID=INTEL, OEM Table ID=DG33TL, OEM Revision=0x1f1, Creator ID=MSFT, Creator Revision=0x1000013 */ P.S. please do not confuse with 'WDDT' :-) -- Andriy Gapon