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Scenario: When trying to mount a volume on a particular drive (V:) that I have used many times in the past, I now get the above error. I am still able to mount the drive with some success on another driver letter.

I checked shares and substituted drives.

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What happens if you try to navigate to V: via an elevated command prompt or Win Explorer? – Karan Mar 4 '13 at 18:36
up vote 1 down vote accepted

I managed to fix the problem by:

  • Attempt to mount the TrueCrypt volume (in my case, V:)
  • From an Admin command prompt, run: mountvol /L
    • Note the driver letters in use
  • Unmount the TrueCrypt volume
  • From an Admin command prompt, run: mountvol /L
    • Note the drive letter that is no longer listed since the dismount (in my case, H:)
  • From an Admin command prompt, using mountvol, remove the drive letter identified above
    • e.g. mountvol H: /D
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