I5 NUC won't boot (other than into EFI Shell)

Hi,

I have a lovely little I5 NUC with 8GB RAM and a 750Gb WD HD. I have installed W7 and the Intel Drivers. It appears that I have selected and incorrect BIOOS setting as now when I boot the NUC it goins into a text screen which states

EFI Shell V2.3.1

Current running mode 1.1.2

map: Cannot find required map name

blah blan blah

Shell >_

I cannot get to the BIOS set up with a keyboard (tried 2 types but does not see the USB keyboard during boot.

I have changed the internal jumper, which allows Keyboard to be seen, but this does not allow me to change BIOS settings

Is there any way to reflash the BIOS to default settings?  I thinks its on the factory level BIOS.

Any suggestions appreciated as I need to get it working by the weekend.

regards

Chris