Have been unable to access XPS 8500 BIOS using Microsoft Keyboard [Ergonomic] Model 1878, while the Microsoft keyboard being replaced, Model 1048, had worked OK.

Noted some internet chatter suggested BIOS reset as a solution; and tried it without success.

I don't fully understand the ins and outs of the BIOS settings, but I noted on internet traffic references to a Fast Boot BIOS entry having been responsible for a similar problem.  I noted no fast boot setting on my BIOS.  I have opted out of Windows 10 "Fast Start" option.

Any one else had this problem with this particular keyboard?

Thanks.

Wayne