How To Open Boot Menu In Dell. The booting process is as follows. Tap the F2 key to enter System Setup when the Dell logo appears.

Power on the computer. You can also set boot menu from BIOS setup. How to Access MSI Boot Menu.
You can also set boot menu from BIOS setup.
At the boot menu select the device under UEFI BOOT that matches your media type USB or DVD. You can see Preparing one-time boot menu that appears in the top-right corner of the screen. The BIOS update can be initiated from inside Windows. Now lets see how to enter the Dell boot menu.

