Hello. I want to boot my computer from my USB flash drive because I have an ISO file burned onto it. I had to change the boot mode from UEFI to legacy. The only way to do that on my computer is to remove the EFI system partition. I tried using diskpart but there was a problem with the MBR. So I used the Easeus partition master to delete the partition. And it said I had to restart the system to delete the partition. It bought me to a screen that said that said the partition was successfully removed. But instead of my lock screen showing up a screen that said "no bootable device" showed up. I pressed ctrl+alt+delete, alt+F10, and a variety of other key combinations but my computer won't boot. Can you please help me?