Windows 8 and 8.1 Forums

Reset Dell BIOS to default

  1. #1

    Posts : 33
    Windows 8.1 Single Language 64-bit

    Reset Dell BIOS to default

    Hi All,

    I have a Dell inspirion 15 laptop running Windows 8.1. A while ago I decided to try Ubuntu out. I installed it alongside Windows 8.1 in dual boot configuration with its own separate hard drive partitions. This means that when I powered on my laptop a GRUB menu (Linux’s boot manager) would come up allowing me to choose between Windows and Ubuntu. However, Ubuntu was more pain than it was worth so I decided to uninstall it. I did this by deleting the hard drive partitions that Ubuntu was installed on using Windows Disk Management. Now when I power on my laptop the GRUB menu still comes up but there are no options to choose from, only a command line interface. I now have to type
    which exits GRUB and takes me to my BIOS Boot Manager which looks like this:

    Boot mode is set to: UEFI; Secure boot: OFF

    ubuntu (ST500LM012 HN-M500MBB)
    UEFI Onboard LAN IPv6
    UEFI Onboard LAN IPv4
    Ubuntu (ST500LM012 HN-M500MBB)
    Windows Boot Manager (ST500LM012 HN-M500MBB)

    I then have to select Windows Boot Manager to boot into windows.

    Does anyone know why GRUB is still there even though I have deleted the Linux hard drive partitions? Also, why is Ubuntu still listed on the BIOS Boot options? And why is it listed twice?

    I would be very grateful if anyone could help me,

    William Dry.

      My System SpecsSystem Spec

  2. #2

    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1

    Windows Boot Manager (ST500LM012 HN-M500MBB)
    to first boot device in the UEFI/BIOS firmware.
      My System SpecsSystem Spec

  3. #3

    Posts : 33
    Windows 8.1 Single Language 64-bit

    Hi theog,

    How do I do this on a Dell?

    Underneath the list that I already mentioned in my first post there is another list:

    Enter Setup
    Peripheral Device setting (OPROM setting)
    Change boot mode setting

    If I choose "Enter Setup" and go to the "Boot" tab I see this:


    Secure Boot <Disabled>
    Load Legacy Option Rom <Disabled>
    Boot List Option <UEFI>

    Add Boot Option

    Delete a Boot Option
    View Boot Option Proberties

    Legacy Boot is greyed out because it is set to UEFI, not LEGACY; but why is "Delete a boot option" and "View boot option properties" greyed out? I can't find anywhere to set first boot device.
      My System SpecsSystem Spec

  4. #4

    Posts : 33
    Windows 8.1 Single Language 64-bit

    I have managed to solve my problem.

    I did it by going onto UEFI BOOT which brought up a list of all the boot devices in order of priority. I could then move them by selecting them with the arrows and then pressing F5 or F6 to move the selected device up or down.

    Thanks for your help,

    William Dry.
      My System SpecsSystem Spec

  5. #5

    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1

    You are welcome.
      My System SpecsSystem Spec

Reset Dell BIOS to default
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