Windows 10: Windows 10 UEFI centos 7 added to dbx

Discus and support Windows 10 UEFI centos 7 added to dbx in Windows 10 Gaming to solve the problem; HI, I had installed Centos 7 along with Windows 10 with secure boot on in uefi mode.Windows:Edition Windows 10 Pro Version 21H2 OS build 19044.2006... Discussion in 'Windows 10 Gaming' started by Terry#7, Oct 5, 2022.

  1. Terry#7 Win User

    Windows 10 UEFI centos 7 added to dbx


    HI, I had installed Centos 7 along with Windows 10 with secure boot on in uefi mode.Windows:Edition Windows 10 Pro Version 21H2 OS build 19044.2006 Experience Windows Feature Experience Pack 120.2212.4180.0 Centos 7:CentOS-7-x86_64-DVD-2009.iso from http://centos.excellmedia.net/7.9.2009/isos/x86_64/CentOS-7-x86_64-DVD-2009.torrent *** Centos 7 got installed successfully in uefi non csm mode on gpt drive.However, the next day centos os failed to boot and crashed while starting up. I tried various things and decided on a fresh reinstall.*** I tried to reinstall everything afresh o

    :)
     
    Terry#7, Oct 5, 2022
    #1

  2. Can not detect windows 10 after installing centos 7

    Hi Sachin,

    Thank you for valuable response.

    • What is the make and model of your system?
    I have no idea how to see that, & since i have only centos 7, it is not easy to find solution on it despite looking for google. Please let me know how to see that?..

    still what i know is :

    -Laptop model: Sony SVF15218

    -Processor : Intel Core i5-3337U CPU @ 1.80 GHz x 4

    -OS type : 64-bit OS(Both Centos 7 & Win 10)

    -Graphics : Intel Ivybrigde Mobile & NVIDIA GT740M

    -HDD : 500 GB

    -RAM : 4 GB

    • Since when are you using the dual boot?
    -I had windows 10 as as a single for almost 2 years. For study purpose i had to install linux (near suited to Red hate), i choose Centos 7 as it is free.

    -I installed Centos 7 on 2nd January 2016.

    -At that time i get help from google & successfully dual-boot as windows 10 shows as windows boot manager & centos. (I can switch between them any time from grub menu.)

    - Due to lack of wifi adapter in centos, while installing packages something went wrong & i had very limited access to centos, so reinstalled centos 7 around 15 days after successful dual-boot(18th Jan) (performed same steps to install as i did the first
    time) & since then my in the grub menu i can only see centos.

    -I tried install centos 7 2-3 time after tha to see windows in grub menu, & i testes/altered almost everything in centos but found out that my windows is somehow not detected by grub.

    • Did you check in msconfig regarding the boot menus, are you getting both the Windows and Linux Boot loader menus?
    - Since i am using linux i have no idea how to do in windows.

    - But i played with centos's grub menu lot of time since missing windows bot manager in grub i am (99%) sure that there is something wrong with windows grub detection.

    Hope i find solution soon...

    Thank you...
     
    Utsav D. H.Bhatt, Oct 5, 2022
    #2
  3. Can not detect windows 10 after installing centos 7

    Sorry for the late reply as i am currently working on centos 7, i do not wish that it gets lost during windows recovery process.

    • How many drives are you able to see in the Linux explorer?
    Yes, i can see 2 windows hard-disk partition Windows 10 UEFI centos 7 added to dbx :)c - 146 GB, :d -150GB) from linux & i can access both of them at any moment from linux.

    • Do you have Windows 10 installation disc with you?
    I do not windows 8/8.1/10 dvd, but i backup dvd as 3 dvd that can restore my windows 8 (officially came when i purchased sony laptop) as when i want, bu the problem it takes 5-6 hours to install & since it will master reset my harddisk every-time i do. Doing
    so will definately remove my cent os.

    The further problem is when win 8 it upgrade to 8.1, it will again reset grub menu & so does from 8.1 to 10. So, every-time i might/will have to repeat installation of either os. & that i definately do not want.

    I hope this steps will not remove my current working os centos 7 in the process.

    I will update here once i do the steps.
     
    Utsav D. H.Bhatt, Oct 5, 2022
    #3
  4. Windows 10 UEFI centos 7 added to dbx

    Upgrading to Windows 10 on Dual boot Windows 7 with CentOS 6.5

    I upgraded from win 7 to 10, and have centos 6.5. After the upgrade, everything still works as set up. I think this is the first version of window NOT to remove grub and make windows boot "at all costs". My centos is still the primary boot on grub. I have
    a normal bios and MBR, not UEFI. It is a 4 year old i5 with 8GB ram.

    Win 10 seems to be a bit faster than 7, although I admit, I use Centos more than windows. The upgrade took a few hours of prep to download what it needed, and a little over an hour to install.
     
    JamesHammer, Oct 5, 2022
    #4
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Windows 10 UEFI centos 7 added to dbx

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