Windows 8 and 8.1 Forums


UEFI Bootable USB Flash Drive - Create in Windows

  1. #480


    Posts : 5
    Windows 7 Pro


    Hello, I have encountered a problem. I have tried to follow exactly the procedures in "downgrade windows 8 to windows 7" and the tutorials about uefi windows 7 installation. After I have created an UEFI bootable USB, I could only boot into the usb by enabling the CSM(and ofc disabling secure boot). I have successfully installed the windows 7 professional. But I have noticed that the PC is now using legacy bios to boot, and when I attempted to disable CSM(i.e. to go back to uefi bios) and boot, an error message prompted and stated"an error occured while attempting to read the boot configuration data" error 0x00000d. I know this question may have been posted before. Anyone can guide me to any link or give any advice?

      My System SpecsSystem Spec

  2. #481


    Posts : 879
    Windows 10


    Hello cydmuse101, and welcome to Eight Forums.

    You will need to install both operating systems in UEFI boot mode.

    -or-

    You will need to install both operating systems in Legacy BIOS boot mode.

    Here is info about UEFI Boot Mode (installing using the GPT partition style) and Legacy BIOS Boot Mode (installing using the MBR partition style): link
      My System SpecsSystem Spec

  3. #482


    Posts : 5
    Windows 7 Pro


    Quote Originally Posted by genet View Post
    Hello cydmuse101, and welcome to Eight Forums.

    You will need to install both operating systems in UEFI boot mode.

    -or-

    You will need to install both operating systems in Legacy BIOS boot mode.

    Here is info about UEFI Boot Mode (installing using the GPT partition style) and Legacy BIOS Boot Mode (installing using the MBR partition style): link
    I am downgrading from Windows8.1to Windows 7pro, when I plug in the UEFI Usb, it occred the same error as I mentioned after the installation, the bcd error 0x00000d, and I have to enable CSM in order to complete the installation. Right now I have installed the Windows7 pro as the only OS in my PC. Is there anything I have done wrong? The tutorial said that the CSM should be enabled.
      My System SpecsSystem Spec

  4. #483


    Posts : 879
    Windows 10


    If you want to install both operating systems in UEFI boot mode.
    - disable CSM
    - disable Secure Boot, because Secure Boot is not compatible with Windows 7
    - you should use UEFI boot mode compatible Windows 7/8 64-bit USB flash drive

    If you want to install both operating systems in Legacy BIOS boot mode.
    - enable CSM
    - disable Secure Boot
    - you should use Legacy BIOS boot mode compatible Windows 7/8 USB flash drive
      My System SpecsSystem Spec

  5. #484


    Posts : 5
    Windows 7 Pro


    Quote Originally Posted by genet View Post
    If you want to install both operating systems in UEFI boot mode.
    - disable CSM
    - disable Secure Boot, because Secure Boot is not compatible with Windows 7
    - you should use UEFI boot mode compatible Windows 7/8 64-bit USB flash drive

    If you want to install both operating systems in Legacy BIOS boot mode.
    - enable CSM
    - disable Secure Boot
    - you should use Legacy BIOS boot mode compatible Windows 7/8 USB flash drive
    No , I am not going to install both OS ,but just a downgrading,I am now using Windows7pro as the ONLY OS .I just want to know if there's a way to get back to UEFI BIOS.
      My System SpecsSystem Spec

  6. #485


    Posts : 879
    Windows 10


    Quote Originally Posted by cydmuse101 View Post
    I just want to know if there's a way to get back to UEFI BIOS.
    Disable CSM, but then you will need to reinstall Windows 7.
      My System SpecsSystem Spec

  7. #486


    Posts : 5
    Windows 7 Pro


    Quote Originally Posted by genet View Post
    Quote Originally Posted by cydmuse101 View Post
    I just want to know if there's a way to get back to UEFI BIOS.
    Disable CSM, but then you will need to reinstall Windows 7.
    but when I disabled CSM during the installation, the bcd error 0x00000d just came out and I couldn't install windows. SO that's why I opted to enable CSM during my installation yesterday. And I remembered that it's in the "downgrade windows 8 to windows 7 " tutorial that I learnt to enable CSM. Isn't it? Or I just got it completely wrong at the beginning?
      My System SpecsSystem Spec

  8. #487


    Posts : 879
    Windows 10


    Quote Originally Posted by cydmuse101 View Post
    I have successfully installed the windows 7 professional.
    Why do you want to change UEFI firmware (BIOS) settings, if you have successfully installed Windows 7 ?

    edit:

    Windows 7 no longer starts, if you change the CSM setting.
    Last edited by genet; 01 May 2015 at 06:11.
      My System SpecsSystem Spec

  9. #488


    Posts : 959
    Windows 8.1, 10


    Hi Shawn,

    Over in TenForums, I suggested an extra (optional) step in Option 2, Step 5, and I've been directed to this thread as the source.

    Instead of
    • select disk #
    • clean


    I use
    • select disk #
    • detail disk
    • clean


    "detail disk" doesn't change anything, but gives a bunch of information about the disk you just selected. The idea is to use that info to double-check that the disk you're about to "clean" is the correct disk!
      My System SpecsSystem Spec

  10. #489


    Posts : 22,272
    64-bit Windows 10


    Hello David,

    That's a good suggestion. Added. Thank you.
      My System SpecsSystem Spec

Page 49 of 52 FirstFirst ... 394748495051 ... LastLast
UEFI Bootable USB Flash Drive - Create in Windows
Related Threads
How to Create a USB Recovery Drive in Windows 8 and 8.1 If you run into problems with your PC, a USB recovery drive can help you troubleshoot and fix those problems, even if your PC won't start. This will show you how to create a bootable recovery (system repair) USB flash drive in Windows...
What size flash drive do I need?
Solved UEFI Bootable USB Flash Drive in General Support
USB Flash Drive has to be in GPT?
here is my problem---I have a hp 475 homeserver with new upgrades. i'm trying to install windows home server 2011 on it. I want to put the whole sys on a bootable flash drive and install that way. so my question is will someone hold my hand and walk me thru step by step. I have ms dvd tool and...
I would like to make a flash drive bootable and I have looked at the utility that HP has called USB Disk Storage Format Tool and every place I have looked to find how to install and use it, the instructions that I have seen do not show up for me when I run the program. Has anyone used the tool or...
Hi there Partition wizard - seems no way to create a USB bootable media -- if your PC doesn't have a physical DVD drive even the PAID PRO version doesn't show the create bootable media option. PLEASE NO ANSWERS FOR BOOTABLE CD --- THIS MACHINE DOESN'T HAVE ONE. Gone back to the FREE GPARTED...
So I want to create a bootable USB for win8 x64. I'v got the ISO. Do I need to follow this: https://www.eightforums.com/tutorials/2227-create-bootable-usb-dvd-windows-8-iso.html or this?: https://www.eightforums.com/tutorials/15458-uefi-bootable-usb-flash-drive-create-windows.html My...
Eight Forums Android App Eight Forums IOS App Follow us on Facebook