Windows cannot boot driver letter has changed


  1. Tofik
    Posts : 12
    7 home prem 64, 7 pro 64
       New #1

    Windows cannot boot driver letter has changed


    Greetings,

    I would be deeply thankful for any guidance on resolving the strange issue:

    After a blackout My Dell M6600 laptop cannot boot at all.
    I have had a certain Intel messages on missing links, scanning MAC address, etc.

    Finally using a repair disk I have found that (I have two drives installed) the boot drive C: has become X: and the other, storage one has taken a letter C:.

    I have an acces to cmd via Window 7 repair disk.
    Alas I have no idea how to change/revert the boot drive letter to become C: (instead of X:).

    I will appreciate any helpful suggestions.
    Many huge thanks in advance.

    Dell M6600 mobile workstation
    Windows 7 Pro 64 bit
      My Computer
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  3. SIW2
    Posts : 16,159
    7 X64
       New #2

    X: shows as boot because you are booted into windows pe - that is the drive letter it assigns to itself.

    That is not connected to the drive letter in the registry of your installed operating system.

    You can use this boot media so you will be able to see what you are doing:

    32 bit
    17514x86.iso


    64 bit
    17514x64-v9.iso
    Last edited by SIW2; 24 Oct 2018 at 09:19.
      My Computers
    Quote Quote

  4. LMiller7
    Posts : 2,497
    Windows 7 Pro 64 bit
       New #3

    The repair disk software has no knowledge of the drive letters as seen by Windows. When you use the repair disk it assigns drives letters to drives for it's own use. These assignments are temporary and have no effect on Windows drive letters.
      My Computer
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  6. Megahertz07
    Posts : 7,351
    Windows 7 HP 64
       New #4

    As explained, when you boot from the repair disk it creates a RAM disk (X:) and install WinPE on it.
    Open a CMD window and type
    Dir C:
    then
    Dir D:
    Dir E:
    ...
    You will find your disk with windows
    Assuming it's E: , Type (replace E: by the drive letter you found typing the dir cmd)
    chckdsk E: /f
    Reboot and try to boot Windows. If you can't, boot from the repair disk and do a start up repair.
      My Computers
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