1. Download the bios you want to deploy from Dell support site. In this example the file is called “O7010A23.exe”
2. Create a SCCM package with the bios file that you downloaded in step 1.
3. Create a new group in your task sequence and call it “Bios Tasks Windows 10”. I create the group because I want only this step to run it is Windows that I deploy. I control that with a SCCM variable.