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So, I worked on a co-worker's computer, and I made changes to the BIOS to allow the computer to boot to a removable media. I'm assuming that I need to get into the BIOS and change the BIOS back from the Legacy to UEFI settings (on the Boot List Options), change the Secure Boot from disabled to enable, and change the Load Legacy Option Rom from enabled to disabled (I think I changed that last one). Is there a particular order that I need to change them in, and can I make the changes all at once, or do I need to change one, come back into BIOS, change another, etc.?