Windows 10: Lost Windows Boot Manager

Discus and support Lost Windows Boot Manager in Windows 10 Installation and Upgrade to solve the problem; I had a 50 WD M.2 SSD and got it almost full so I decided to upgrade to a 1tb WD NVMe drive. I did a clone of the 500gb drive to the 1tb drive. Booted... Discussion in 'Windows 10 Installation and Upgrade' started by DannyShamoon, May 29, 2021.

  1. DANNYSHAMOON
    DannyShamoon Win User

    Lost Windows Boot Manager


    I had a 50 WD M.2 SSD and got it almost full so I decided to upgrade to a 1tb WD NVMe drive. I did a clone of the 500gb drive to the 1tb drive. Booted fine and rebooted OK, then I decided to shut it down completely to install the case side. On start up it won't boot, and got the error insert a boot disk. Upon entering the mobo BIOS, I noticed that the windows boot manager for the drive was missing. When I installed the NVMe drive I was told it was best to run as UEFI and not Legacy. Unbeknown to me, apparently that how I lost the boot sector. I performed the commands BOOTREC/fixmbr success

    :)
     
    DannyShamoon, May 29, 2021
    #1
  2. EILEEN GAL
    Eileen Gal Win User

    Windows boot manager

    There could be some system conflict triggered after the said changes. To help you with your concern, we suggest that you perform a clean boot. A
    clean boot is performed to start Windows by using a minimal set of drivers and startup programs. This will help to determine what is causing the issue on the Windows boot manager. To do this, click on this
    link and scroll down to the
    How to determine what is causing the problem by performing a clean boot section then follow the steps listed..

    Note: If the installation is successful and the issue has been resolved. Please go through the section “How to reset the computer to start as usual” to reset your computer to the normal startup.

    Let us know how it goes after performing the suggested steps.
     
    Eileen Gal, May 29, 2021
    #2
  3. GSG-9
    GSG-9 Win User
    Lost the Seagate...

    The drive seems to be completely dead, my computer will not boot if I have it connected...to the windows cd or the new installation on the F1 drive (which is the boot drive now by the way)

    Thanks for the above article, im booting into Vista: U 64 right now, I cant follow those steps if the drive is in, it will lock up before it gets that far or if its not a cold boot the drive does not appear on the list.
     
    GSG-9, May 29, 2021
    #3
  4. GNJHA
    GNJha Win User

    Lost Windows Boot Manager

    Boot Process

    Hi,

    Please suggest me a link that can explain the boot process step by step of ...

    • Windows 7,
    • Windows 8.1,
    • Windows 10,
    • Windows Server 2008 R2 and
    • Windows Server 2012 R2

    With Regards

    InTech
     
    GNJha, May 29, 2021
    #4
Thema:

Lost Windows Boot Manager

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