Hello Covemoon, thank you very much for contacting us through Intel Communities.
You may want to check the following thread on a user was having a similar issue. DN2820FYKH - Cannot get into Bios Settings after update
You can also try doing a BIOS update using minimum configuration.
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I am not from Intel but I question the other thread they pointed you to.
I have a feeling that you may be using a Microsoft keyboard and you may need to switch to some non-Microsoft keyboard until you update the BIOS. That is a problem I had (I also had to switch from a computer monitor to a TV display, but I don't think you reported that problem). After the BIOS update, I was able to use Microsoft keyboard (and computer monitor).