Windows 10: PC doesn't boot from C:/ drive Solved


  1. Posts : 175
    Win 10 Pro 64bit Fall CU
       22 Dec 2017 #1

    PC doesn't boot from C:/ drive


    Don't know if this goes here or not but I have a PC that I installed a new mobo and memory on and added a HDD. Ever since the new mobo has been installed, the PC will not boot from the C:/ drive no matter how it's configured in the BIOS of the board. If I boot the PC and select F12 for boot selection, the only way it'll boot is if I select my Macrium backup drive.

    This has been bugging me ever since the installation. Tonight I was looking at the various HDD properties in device manager and, lo and behold, my backup drive is marked with 'system' but my C:/ drive is not, even tho boot is in the configuration.

    Does anyone know how the heck a backup drive ended up with 'system' properties even though I formatted it prior to installation on this PC as a backup drive and how can I get my C:/ drive marked as system?

    Click image for larger version. 

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    And, Merry Christmas everyone, too.
      My ComputerSystem Spec


  2. Posts : 4,498
    Mac OS High Sierra 10.13.5
       23 Dec 2017 #2

    It does not matter where the order is. If the MBR knows where C: is, it will boot from it. Just do a repair and be done with it.
      My ComputerSystem Spec

  3.    23 Dec 2017 #3

    Switch Data cable of the Backup Drive F: with the C: drive, so the C: drive is using SATA port 0 (probably marked as port 1 on the motherboard)
    If that doesn't work, then unplug Backup drive F: and restart the computer booting from the Windows 10 installer media. Choose your language, and then choose Repair Your Computer. Once the computer boots normally to the C: drive, shut it down and plug in the Backup Drive again.
      My ComputerSystem Spec

  4.    23 Dec 2017 #4

    Have you checked BIOS to make sure the boot order is correct?
      My ComputersSystem Spec


  5. Posts : 2,424
    Ubuntu14.04x64 MintMate17x64 Win10Prox64
       23 Dec 2017 #5

    You have all the disks marked "Active" and your C drive is connected to the last Sata port. Only the disk (C: drive) that you boot from must be marked "Active".
    From the screen shot, The boot manager is in disk 0 (F: drive).
    1. Download EasyBCD 2.2 - Neowin . Install,run then follow the screen shot to move the Boot Manager to C Drive.
      Click image for larger version. 

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    2. Now mark disk0 and disk1 inactive. From Admin Command, type:
      diskpart
      select disk 0
      select par 1
      inactive
      select disk 1
      select par 1
      inactive
      exit

    Reboot. Your OS should boot from C.
      My ComputerSystem Spec

  6.    23 Dec 2017 #6

    spunk said: View Post
    Switch Data cable of the Backup Drive F: with the C: drive, so the C: drive is using SATA port 0 (probably marked as port 1 on the motherboard)
    If that doesn't work, then unplug Backup drive F: and restart the computer booting from the Windows 10 installer media. Choose your language, and then choose Repair Your Computer. Once the computer boots normally to the C: drive, shut it down and plug in the Backup Drive again.


    This is the quick and easy way to fix this.
      My ComputerSystem Spec


  7. Posts : 175
    Win 10 Pro 64bit Fall CU
    Thread Starter
       23 Dec 2017 #7

    You guys are amazing! Thanks a lot for all your help!!!!!!
      My ComputerSystem Spec

  •    23 Dec 2017 #8

    If our suggestions helped you solve your problem, please tell us which one you did to solve it, so others may follow if they have the same problem and give that person a Thumbs up under their computer specs.
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