Windows 10: Inaccessible boot device - after windows update (regular update)

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  1.   My ComputerSystem Spec


  2. Posts : 17,810
    windows 10 professional version 1607 build 14393.969 64 bit
       31 Jan 2018 #12

    Did it boot when clicking the automatic restart or is this the first automatic restart?

    What menu do you see when clicking advanced options?
    Last edited by zbook; 31 Jan 2018 at 20:05.
      My ComputerSystem Spec

  3.    31 Jan 2018 #13

    Yes it boots once I get in accessible boot device error, it reboots tries to auto repair, fails, and says your PC did not start correctly and I click advanced options which and then troubleshoot, and then advanced options show up such as system restore, command prompt etc
      My ComputerSystem Spec

  4.   My ComputerSystem Spec

  5.    31 Jan 2018 #15

    If you don't have Windows 10 Installation DVD then click "Advanced Options" from Automatic Repair screen this will allow you to use tool at Windows Recovery Environment (WinRE) environment.

    Click Troubleshoot link.


    After you click Troubleshoot the Troubleshoot screen appears.



    Reset your PC: Reinstall Windows OS using the installation DVD or factory recover image on the hard disk drive but removes all personal data, apps, and settings from the PC.

    In Windows 10, Reset your PC gives you two option they are:

    Keep My file: Removes apps and setting, but keeps your personal files.

    Remove everything: Removes all of your personal files, apps and settings.


    Click “Advanced options” on the Troubleshoot screen to access more WinRE recovery utility’s in “Advanced options” screen.



    If you have not try below tools.

    System Restore
    : Restores Windows OS to a previous state that was without any system errors.

    Automatic Repair (Startup Repair) : Windows will attempt to diagnose and correct common boot problems It corrects issues, such as corrupt registry hives, missing system files and drivers, disk boot sector corruptions, and other startup issues.



    From Windows Recovery Environment start the Command Prompt.

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

    Following command will fixes errors on the disk and locates bad sectors and recovers readable information.


    Code:
    Chkdsk D: /r


    Please replace partition letter D: with Windows installed partition letter. When computer boots into Windows Recovery Environment (WinRE) environment the drive letter assign to Windows partition may not be C: drive letter because Windows 7, 8 , 8.1 and 10 creates a separate system partition when it's installed from scratch. The system partition contains boot files WinRE assigns the system partition the C: drive letter and the Windows installed partition will be assign any other drive letter usually D: drive letter is assign to Windows installed partition. The Bcdedit /enum | find "osdevice" command can be use to find out the drive letter of the Windows installed partition the output of the Bcdedit command is similar to this osdevice partition=D:. The drive letter after partition= is the drive letter of the Windows partition.



    From Windows Recovery Environment start the Command Prompt.

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

    The following command scans integrity of all protected Windows system files and repairs files with problems when possible.

    Code:
    Sfc  /Scannow   /OFFBOOTDIR=D:\   /OFFWINDIR=D:\Windows


    Please replace partition letter D: with Windows installed partition letter. When computer boots into Windows Recovery Environment (WinRE) environment the drive letter assign to Windows partition may not be C: drive letter because Windows 7, 8 , 8.1 and 10 creates a separate system partition when it's installed from scratch. The system partition contains boot files WinRE assigns the system partition the C: drive letter and the Windows installed partition will be assign any other drive letter usually D: drive letter is assign to Windows installed partition. The Bcdedit /enum | find "osdevice" command can be use to find out the drive letter of the Windows installed partition the output of the Bcdedit command is similar to this osdevice partition=D:. The drive letter after partition= is the drive letter of the Windows partition.




    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

    If you can please post a screenshot of above three commands output.


    Restart your computer to see boot issue resolved.
      My ComputerSystem Spec


  6. Posts : 17,810
    windows 10 professional version 1607 build 14393.969 64 bit
       31 Jan 2018 #16

    Once the above commands are successful perform the following steps:

    1) create a brand new restore point
    2) backup all files to another drive or to the cloud
    3) make a backup image using Macrium:
    Macrium Software | Your Image is Everything
    Backup and Restore with Macrium Reflect Backup Restore Tutorials
    4) If the above commands do not fix the inaccessible boot device there are additional troubleshooting steps
      My ComputerSystem Spec

  7.    31 Jan 2018 #17

    Thanks, I started chkdsk command you stated shows about 25:37:22 as in 25 hrs does that sound correct?
      My ComputerSystem Spec

  •    31 Jan 2018 #18

    Far as i can remember check disk command does not display how long error scan will take but it should show how long it has been scanning for errors.
      My ComputerSystem Spec


  • Posts : 17,810
    windows 10 professional version 1607 build 14393.969 64 bit
       31 Jan 2018 #19

    When running chkdsk from administrative command prompt chkdsk commands often will rise quickly to a percentage number in the low teens and then remain there until the command has completed.
    When running chkdsk commands from the windows PE or RE environment it typically displays the estimated time.
    That is a lot of time. On a 750 GB drive it took approximately 4 hours.
    The duration of the time will depend on the size of the drive, the findings and the available space.


    What is the size of the drive on the computer?
    When available please post a URL or hyperlink for the computer (drivers webpage)
      My ComputerSystem Spec

  •   My ComputerSystem Spec


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