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As you know, the following values can be changed by using BCDEDIT:

device partition=E:
osdevice partition=E:

But question is that how did BCD name a certain volume (e.g. E: above) and how can it be corrected? Depending on windows installation method, this drive letter can differ for the same partition. Then, is there a document for BCD explaining about this?

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The easiest way would be to open a command prompt, either in Automatic Repair, or in WinPE. Assign drive letters to the System partition (e.g. D:) and to the OS/Windows partition assign the letter (C:). Then used BOOTREC to rebuild the BCD store.

  • DISKPART
  • lis dis (identify OS harddrive)
  • sel dis 0 lis par (identify above System and OS partitions)
  • sel par 1 (e.g. System)
  • assign letter=D
  • sel par 3 (e.g. OS/Windows)
  • assign letter=C
  • exit

then

  • BOOTREC /FIXBOOT (should say "Successful")
  • BOOTREC /REBUILDBCD (Should find C:\WINDOWS - choose Y option to add to the boot store)

Reboot the system and hopefully it should start.

  • Thank you very very much, the above answer solved the problem! Although "BOOTREC /FIXBOOT" isn't required for this problem. – Bahram Alinezhad Feb 3 '18 at 21:00

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