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How to disable Secure Boot mode on BIOS for Dell machines : Evren Support Portal
No boot device found when you change the Boot sequence to Legacy mode | Dell US
wireless - Having trouble disabling secure boot - Ask Ubuntu
Solved: Latitude 5590, UEFI Boot sequence empty - Dell Community
How to disable Secure Boot mode on BIOS for Dell machines : Evren Support Portal
Solved: hard drive doesn't appear in boot sequence - Dell Community
Disable Legacy Boot Mode and Enable UEFI
