Windows 8 and 8.1 Forums


Second Operating System

  1. #1

    Second Operating System


    I downloaded Ubuntu 12.10 from a pen drive onto a USB external hard drive, but after a mixed success I have decided to abandon Ubuntu. However one problem still remains, both the pen drive and external hard drive are NOT plugged into my laptop, when I press the following:
    Settings.
    Change PC settings.
    General.
    Advanced Start.
    Use a device.
    The resultant screen still shows TWO Ubuntu options, Is is possible to delete these options?
    Regards
    Northerner

      My System SpecsSystem Spec

  2. #2


    Posts : 1,121
    Windows 8.1 x64


    You do not mention, but I will assume you have a system configured as UEFI. You also may have tried to install Ubuntu as UEFI and are left with some extra boot managers.

    I do not seem to show any devices in the place to which you refer or even an option to use those devices, so I am just basically guessing about your situation.

    You might try opening an Administrative command prompt (Winkey and type cmd, then CTRL+Shift+Enter) to check the BCD store. When it is open, type bcdedit /enum firmware and see if the Ubuntu entries show up.

    If the entries do show up, you will be able to delete them from the store and those boot managers will be gone. But again, I am not sure this is your situation. Attaching a copy of the command window might be helpful. Use the snipping tool and paperclip on advanced replies.

    Just a note, if you could not install Ubuntu, in the Bios, you might have to adjust some of the Windows 8 secure UEFI settings to allow for other OSes.
      My System SpecsSystem Spec

  3. #3

    Second Operating System


    Thank you for your reply, did as you said and two Ubuntu items appeared (see attachment), how do I delete these?

    Regards
    Northerner
    Attached Thumbnails Attached Thumbnails Capture.PNG  
      My System SpecsSystem Spec

  4. #4


    Posts : 1,121
    Windows 8.1 x64


    You will need to use the bcdedit /delete command. It would look like:

    bcdedit /delete {GUID}


    with the GUID number being copied from the Ubuntu entries. To see an option for the command, type bcdedit /? delete

    But in the command prompt window, you can copy something by right clicking and selecting MARK. Then highlight the GUID number for the Ubuntu entry and hit enter. Then right click again and Paste will put the copied material where the cursor is.

    So in your case, you would type bcdedit /delete {37ca6e21------63e} and do this for both Ubuntu entries. After you do one, check again and make sure it was deleted.

    Before you do this you may want to backup the BCD store by using the /export switch, which exports the store to a file which can be restored by using the /import switch. Get help with bcdedit by typing bcdedit /?

    If you have any questions, post back.
      My System SpecsSystem Spec

  5. #5


    Hi
    Typed in what you said (copy was no highlighted), on hitting enter [unknown command] appeared.
    Regards
    northerner
      My System SpecsSystem Spec

  6. #6


    Posts : 1,121
    Windows 8.1 x64


    OK, in the command prompt window, can you copy and paste normal stuff. Right click the select Mark. Hit enter to copy. Then right click and select Paste and what you copied should show up at the cursor.

    You have to copy the GUID number, including the Curly Brackets to the position in the command. Type it if you like.

    But your command should be:

    bcdedit /delete {37ca6e21-5b8b-11e2-aa1f-b03903f0c63e}

    with a space between bcdedit and / and between delete and { Make very sure to confirm the numbers.

    Just for illustration.....
    Attached Thumbnails Attached Thumbnails Right Click 1.JPG   Right Click 2.JPG   Right Click 3.JPG  
    Last edited by Saltgrass; 11 Jan 2013 at 19:59.
      My System SpecsSystem Spec

  7. #7


    Posts : 1,770
    Windows Phone 6, Windows CE 5, Windows Vista x32, Windows 7 x32/x64, Windows 8 x64
      My System SpecsSystem Spec

  8. #8


    Posts : 1,121
    Windows 8.1 x64


    Some more pictures..
    Attached Thumbnails Attached Thumbnails Ubuntu Test4.JPG   Ubuntu Test 2.JPG   Ubuntu Test3.JPG  
      My System SpecsSystem Spec

  9. #9


    Saltgrass you are a star, I missed the space in the command prompt.
    As a matter of interest how do I get my internal optical drive to appear in the same screen. no matter what I do I cannot load Ubuntu from the installer disc because my laptop appears not to see it.
    When I installed Ubuntu last time from a pen drive onto an external drive everything appeared to be working fine until Windows 8 refused to boot (something about grub 2 flashing on the screen), I had to recover Windows to be able to boot up again. I cannot understand the problem because I ensured that the Ubuntu boot loader was installed on the external hard drive.
    Any advice please before I try to load Ubuntu again.
    Regards
    Northerner
      My System SpecsSystem Spec

  10. #10


    Posts : 1,121
    Windows 8.1 x64


    I am in Ubuntu now. To install, you will have to use the UEFI install version, which it appears you have tried before.

    But different OEMs set up their UEFI bioses differently. On my system (ASUS P8Z77), to boot to and Install Ubuntu, I have the Compatibility Support Module (CSM) set to enabled (setting to disabled, enables the Windows 8 secure boot). And on a Secure Boot option I have to select "Other OS", since the other option is a Windows UEFI. These are both on the boot tab of the bios page. I also have "Fast Boot" disabled to make it easier to get into the bios setup.

    They are locking down access to bioses in order to allow for a more secure systems, so what you may have to adjust depends on your system. But to take advantage of the higher security in Windows 8, until the other OSes do something to conform, dual booting may not be available.

    And I used a flash drive to install, seems to go faster that way. You might look at my disk management picture to see if it resembles yours.

    Edit: I have no experience with using an External Hard Drive to boot into an OS, so I can't even comment.
      My System SpecsSystem Spec

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