Much of this CPU support is a combination of two items. The motherboard chipset and BIOS. If HP or Pegatron don't issue a BIOS to support the CPU then you'll get that message and won't be able to use the newer CPU. As the BIOS is not open source you can't fix that except to replace the board. However that would trigger having to replace the OEM Windows. Lesson? Always find the CPU support list before swapping CPUs. Just because it's the right socket does not mean it will fly.
Bob