Certain Windows Fastboot systems do not give access to the BIOS, requiring you to reset the BIOS manually to access them.

If you need to reset the BIOS manually, you can do this by removing the battery from the motherboard or physically branching the CMOS reset connectors on the motherboard.

Instructions: Turn off and disconnect your computer from current. Make sure you and the computer are grounded and protected from static, as static can be very damaging, even fatal, to your delicate components. Open the case and identify the CMOS battery – it is like a big hearing-aid battery. Carefully remove the battery. Now hold down the power button to drain any residual power from the motherboard. Re-attach the battery and now reboot the computer pressing Delete key or F8 or F2 (etc.) keys to reach the BIOS.

If this does not work you can branch the the CMOS reset connectors on the motherboard. Consult your motherboard manual to find these connectors.

Once you have accessed your BIOS and made any necessary changes, you can choose to reinitiate the Fastboot if you want. I do not use Fastboot on my own PCs but activate it on the PCs I build for my clients.