ariawatson said:
I am using ASUS Laptop X35U and N550JV. It also create confusion for me (Del key for BIOS Boot MENU). So I saved a image for ASUS laptops boot menu. Image Source - Boot Menu Key for Asus Laptops
Great chart!

The take away is that we cannot assume to know the keys that someone else will use to get into BIOS settings or the Boot Menu.
The owner must check their system as was suggested earlier in this thread.

As we can see here, Asus is partial to the ESC key for the Boot Menu.