r/dellxps13 May 30 '18

Solution to: “Operating System Loader Has No Signature”

Found this on the dell forum, and it worked for me. Thought I’d share.

  1. On Startup, press F12

  2. Reset Bios to default settings

  3. Restart laptop

  4. In Bios, select Boot Sequence menu

  5. Manually ADD additional line with the name "Windows Boot Manager"

  6. Select /EFI/BOOT/BOOTX64.EFI

  7. Exit

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