Instructions in short, 

First flash matching official bios standard way, then in windows:

Run "flashme.cmd" as adminstrator (you will need to open an admin cmd, and cd to the directory and type "flashme.cmd"  Don't just right click it).  Allow it to finish flashing.  Reboot.  Enter BIOS.  A new menu may be unlocked (your settings may also be reset).  Don't touch most of the stuff, it's largely locked for a reason.  Open "PCH-FW Configuration" and disable or enable the ME as you please.

If you see no menu at all, it may have just worked with no user intervention required.  Boot to windows and check.