union _WHEA_ERROR_RECORD_HEADER_VALIDBITS// Size=0x4
{
    unsigned long PlatformId:1;// Offset=0x0 Size=0x4 BitOffset=0x0 BitSize=0x1
    unsigned long Timestamp:1;// Offset=0x0 Size=0x4 BitOffset=0x1 BitSize=0x1
    unsigned long PartitionId:1;// Offset=0x0 Size=0x4 BitOffset=0x2 BitSize=0x1
    unsigned long Reserved:29;// Offset=0x0 Size=0x4 BitOffset=0x3 BitSize=0x1d
    unsigned long AsULONG;// Offset=0x0 Size=0x4
};