1.    28 Jun 2016 #1
    Join Date : Oct 2015
    Posts : 10
    Windows 10

    Unable to boot into Windows - Disk Corrupted


    I have a DELL Inspiron 17R SE 7720.
    I was running Windows 10. A couple of weeks ago or so, I installed some Windows updates. Immediately after the update and subsequent restart, I noticed that my Disk usage started to fluctuate wildly, spiking with considerable frequency to 100% and then coming back down, before spiking again.
    I tried to reboot my laptop.
    However, when I tried to reboot, my laptop wouldn't boot into WIndows, after a long time trying to boot up, it gave me a message saying a device is not found and I should use a recovery or repair disk.
    Using the Microsoft Media creation tool, I created a recovery disk on my USB and made it bootable using Rufus.
    On my laptop, using my BIOS, I changed my boot to Legacy from UEFI, to enable a boot from USB.
    After plugging in the USB disk, I tried booting up from there, which happened successfully, I then tried one of the repair options, i.e., trying to reset my laptop keeping the files. Unfortunately, it said that my Disk was locked and hence a reset could not be performed.
    I tried the reset option again after a reboot, but I got the same error message. I then tried to bring up the command prompt with "Shift + F10" on the repair screen, and tried the following :
    CHKDSK /R
    This reported that the Master File table is corrupt and that it was unreadable, and it would try to get it from the file system. Unfortunately, after waiting a really long time, it failed to get the Master File table.
    Subsequently, from the Command Prompt, I tried the following :
    BootRec /FixMbr
    BootRec /FoxBoot
    These operations completed successfully, but as I was to find out, did not help at all.
    I then tried the following BootRec command..
    BootRec / ScanOs -This told me that there were 0 OS installations
    BootRec / RebuildBsd - This also told me that there were 0 OS installations, and would not proceed.
    I thought to navigate to the boot folder and rename or remove the existing boot record, in case it was locked or hidden...
    So I tried to navigate to
    C:\Boot - from the command prompt, but it said the file structure was corrupt and unreadable.. I got the same response if I tried to navigate to any folder on the C Drive.
    My disk was functioning normally till the time I installed those updates. I don't think it is a hardware issue, even though my laptop is 3 years old.
    I have no idea what can be done now. Apparently, there is no restore point.
    I do not wish to re-install Windows, I had a lot of data on the disk, which I do not wish to lose.
    Kindly advise.
      My ComputerSystem Spec
  2.    28 Jun 2016 #2
    Join Date : Jul 2014
    San Jose, California
    Posts : 2,055
    Ubuntu14.04x64 MintMate17x64 Win10Prox64

    On my laptop, using my BIOS, I changed my boot to Legacy from UEFI
    • If your BIOS was set to UEFI then Windows was installed using GPT partition scheme. There are 2 modes to boot the USB from: Legacy and UEFI, you should not change the BIOS setting to Legacy.
    • BootRec /FixMbr and BootRec /FixBoot only work with MBR partition scheme, yours is GPT


    1. Download: Rescue.V6.1.1311.iso - Google Drive and use Rufus to create a bootable USB with format: FAT32, MBR partition scheme for BIOS or UEFI
      Click image for larger version. 

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    2. set your BIOS back to UEFI and boot up from the USB (select UEFI boot mode).
    3. Click on "Fix Windows boot problems"

      Click image for larger version. 

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      My ComputerSystem Spec
  3.    28 Jun 2016 #3
    Join Date : Oct 2015
    Posts : 10
    Windows 10
    Thread Starter

    Thank you. I shall try this and let you know. I am concerned because my disk is coming as unreadable...I do not wish to lose any data.
      My ComputerSystem Spec
  4.    28 Jun 2016 #4
    Join Date : Jul 2014
    San Jose, California
    Posts : 2,055
    Ubuntu14.04x64 MintMate17x64 Win10Prox64

    Quote Originally Posted by starbearer View Post
    Thank you. I shall try this and let you know. I am concerned because my disk is coming as unreadable...I do not wish to lose any data.
    On the screen in step 3 above. On the bottom, there are icons for Command Prompt, File explorer ...
    Use File Explorer and try to open C Drive to see if you can save your data from it to another HD, if not try chkdsk /r again, it will take a while to complete depending how corrupted it is.
      My ComputerSystem Spec
  5.    29 Jun 2016 #5
    Join Date : Oct 2015
    Posts : 10
    Windows 10
    Thread Starter

    Quote Originally Posted by topgundcp View Post
    On the screen in step 3 above. On the bottom, there are icons for Command Prompt, File explorer ...
    Use File Explorer and try to open C Drive to see if you can save your data from it to another HD, if not try chkdsk /r again, it will take a while to complete depending how corrupted it is.
    I tried the steps above, but with with very little success.
    Even though I made the disk bootable with Rufus the way shown above, booting from USB was absent as an option in my BIOS UEFI boot options. Even when I wanted to create a BOOT option with USB under UEFI, it did not detect my flash drive.

    On the other hand, it was perfectly visible in Legacy. So I turned Legacy options on, keeping UEFI Boot option. Aafter reboot, I chose the USB option from legacy. It allowed me to head over to the screen from where any of the above options were possible.

    From the file explorer, I could not navigate to any folder within C Drive. Also, it did not show me any properties from C Drive. From the boot option, it failed to detect any OS installed anywhere in the system. However, I asked for a boot fix. Eventually that didn't do anything.

    I used the command prompt to run a CHKDSK on C Drive. I got a message saying Master File table is corrupt and that WIndows will attempt to retrieve it from the file system. Unfortunately even after keeping it for 8 hours, nothing happened on this.

    When I rebooted the next time, instead of saying that WinLoad.efi is missing, it said some other file within boot cannot be found, and repeated the same advice of using a repair or installation disk.

    Any further suggestions, please? Is it a Disk issue? Would it change if I somehow manage to load from USB within UEFI, if so, I'll ry and see how I can make the USB visible as a boot option for UEFI.
      My ComputerSystem Spec
  6.    29 Jun 2016 #6
    Join Date : Jul 2014
    San Jose, California
    Posts : 2,055
    Ubuntu14.04x64 MintMate17x64 Win10Prox64

    Check the BIOS with UEFI enabled and secure boot disabled then try to boot the PC with UEFI mode. However, it sounds like your HD is corrupted and depending how corrupted it is, chkdsk will take a long time to fix, you'd need to let it run till finished.
      My ComputerSystem Spec

 


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