The ME vulnerability and Spectre/Meltdown are two different issue. To mitigate Spectre/Meltdown you need the latest BIOS with the updated microcode (3703 I believe fore the Viii Hero). You also need to have loaded up the Windows security patch.
The ME vulnerability was mitigated last month via the ME driver and ME update tool. Published 11/22.
To correct both, load the latest bios 3703, update windows with the security patch KB4056892, run the ME update tool, and load the latest ME driver 11.7.0.1040.