In order to access the BIOS again please try the following steps:
- Turn on the NUC.
- Once it is on, please unplug it directly from the AC power.
- Plug it in again and you will be able to press F2 to access BIOS and make the necessary chances.
Sylvia, above described solution does not work. My NUC still freezes on the big INTEL screen when I press F2. Bios is .0025