Windows 10: Windows 10 won't boot after installing Ubuntu to a different drive Solved

Page 2 of 3 FirstFirst 123 LastLast
  1.    02 Feb 2018 #11

    I use diskpart and bcdboot to shrink the OS partition by 100MB, create a FAT32 partition in the empty space, use BCDBOOT to write the boot files to it, then change the partition ID to EFI system partition. You should be able to do it while booted into the Windows that is on "HDB". The only issue will be that you won't have a standard partition layout on "HDA", the partitions will be out of order.
      My ComputerSystem Spec

  2.    02 Feb 2018 #12

    Beginning in Windows 10, Microsoft reserved partition (MSR) partition size is 16 MB.

    Add an MSR to each GPT drive to help with partition management. The MSR is a reserved partition that does not receive a partition ID. It cannot store user data.

    This partition is not use for booting Windows 10 the EFI System Reserved partition is use for booting Windows 10.

    The minimum size of EFI System Reserved partition is 100 MB, and must be formatted using the FAT32 file format.



    Please boot your computer with Windows 10 Installation Media and from Windows Recovery Environment start the Command Prompt.

    Please type below commands into Command Prompt and press Enter key.

    Following commands will repair Master Boot Record (MBR), Boot Sector and BCD Store.


    Code:
    Bootrec /FixMbr
    
    Bootrec  /FixBoot
    
    Bootrec  /RebuildBcd

    Please post a screenshot of these three commands outputs.
      My ComputerSystem Spec

  3.    02 Feb 2018 #13

    FreeBooter said: View Post
    Please boot your computer with Windows 10 Installation Media and from Windows Recovery Environment start the Command Prompt.

    Please type below commands into Command Prompt and press Enter key.

    Following commands will repair Master Boot Record (MBR), Boot Sector and BCD Store.


    Code:
    Bootrec /FixMbr
    
    Bootrec  /FixBoot
    
    Bootrec  /RebuildBcd

    Please post a screenshot of these three commands outputs.
    That won't work on the OP's first hard drive because they do not have an EFI System Partition existing on the drive to repair.
      My ComputerSystem Spec

  4.    02 Feb 2018 #14

    NavyLCDR said: View Post
    That won't work on the OP's first hard drive because they do not have an EFI System Partition existing on the drive to repair.
    What do you mean i seen the EFI partition at posted screenshot at post 9.
      My ComputerSystem Spec

  5.    02 Feb 2018 #15

    If Windows 10 installed HDD missing a EFI System Reserved partition you can create one by following below instructions.


    Please boot your computer with Windows Installation Media and from Windows Recovery Environment start the Command Prompt.

    From Command Prompt execute below commands one at a time:


    Code:
    Diskpart
    
    List Disk 
    
    Select Disk 0
    
    List Partition
    
    Select Partition X 
    
    Shrink desired=100
    
    Create Partition EFI
    
    FORMAT FS=FAT32 LABEL="EFI"
    
    Assign Letter=W
    
    Exit
    
     bcdboot C:\Windows /s W: /f  ALL
    Use "List Disk" command to find out disk number assign to Windows 10 installed drive.

    Replace number 0 zero with disk number assign to Windows 10 installed drive

    Use "List Partition" command to find out Windows 10 installed partition assigned number.

    Replace X letter with Windows 10 installed partition assigned number.

    You may need to replace C: drive letter with Windows 10 installed partition drive letter.

    I have to warn you Diskpart tool is very dangers so please make sure to execute Diskpart command carefully.
    Last edited by FreeBooter; 02 Feb 2018 at 16:43.
      My ComputerSystem Spec

  6.    02 Feb 2018 #16

    FreeBooter said: View Post
    What do you mean i seen the EFI partition at posted screenshot at post 9.
    Look at post #10. The OP is trying to get Drive 1 in that screenshot to boot.
      My ComputerSystem Spec

  7.    02 Feb 2018 #17

    NavyLCDR said: View Post
    Look at post #10. The OP is trying to get Drive 1 in that screenshot to boot.
    Weird in post #9 the Disk 1 have a EFI partition but not at post #10, any how i have posted instructions for the OP to follow to create a EFI System Reserved partition.
      My ComputerSystem Spec

  8.    02 Feb 2018 #18

    Thank you everyone for the help. Unfortunately, I'm not at home right now, so I can't try the fixes you guys recommended, but I expect to be back home tomorrow and will be trying them out.
    Weird in post #9 the Disk 1 have a EFI partition but not at post #10, any how i have posted instructions for the OP to follow to create a EFI System Reserved partition
    It's because Disk 1 in post #9 is Disk 2 in post #10 which is the disk with the fresh Windows 10 install, running Partition Tool. The disk I'm trying to fix is Disk 1 in post #10, which was not showing in post #9 for some reason, and began to show later when I changed some BIOS options (to boot from UEFI Only).
      My ComputerSystem Spec


  9. Posts : 20,986
    windows 10 professional version 1607 build 14393.969 64 bit
       02 Feb 2018 #19

    1) See if you can find a camera or smart phone camera to take pictures of the display so that we can view the results in the thread.

    2) Open the website for the computer or motherboard manufacturer > enter the model > select the operating system > view drivers > post a URL or hyperlink into the thread

    3) Create a bootable Windows 10 iso:
    Download Windows 10
      My ComputerSystem Spec

  10. AddRAM's Avatar
    Posts : 2,113
    Windows 7 Pro x64 Windows 10 Pro x64
       02 Feb 2018 #20

    He has an installer. He states he did a clean install to HDB in reply #9 :)
      My ComputersSystem Spec


 
Page 2 of 3 FirstFirst 123 LastLast

Related Threads
Hi guys, So I'm no longer able to boot into my main drive, but all my files and folders on that drive still look intact. I honestly don't know what went wrong or if there is any way to fix this other than reinstalling Windows. Tried startup...
Re-installing Windows 10 over Ubuntu in Installation and Upgrade
A friend of mine installed Ubuntu 14.04 on my laptop because he thought it would make it faster but I have almost know knowledge of the operating system so its been pretty horrible. I made a boot USB drive using the windows media creation tool and...
I used to use Windows for my work and It used to boot very fast. However, after dual boot with Ubuntu, my windows boot time became very long, it was annoying. I deleted Ubuntu, FORMATED ALL DRIVE, devided partitions, reinstalled Windows but it is...
Apologies for the very basic question, but this is my first attempt at creating a virtual machine within Windows 10 pro using hyper-v. I have created a VM, and during the process allocated a drive/folder for that VM, and selected the Linux iso file...
Hi, just want to check can I duel boot W10 & W7 on a SSD drive. Thanks
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 00:31.
Find Us