What drivers for what OS?
Of course DEL does not get you into the BIOS. All INTEL boards use F2.
Doc (not an Intel employee or contractor)
Ooo, that's a tough one. Intel mostly cleared off the older versions that would still have support for the Q77 chipset. But, you are in luck, there's a version that is still there to support the NUCs with 3rd gen processors and you can use it for your board. Here is a link: https://downloadcenter.intel.com/download/23091/Intel-Management-Engine-Intel-ME-Consumer-Driver-for....
Hope this helps,