How to fix Windows 10 version 1803 “Hidden Drive” bug using Diskpart

It’s just two days now after the release of latest Windows 10 1803 update. It is the fifth major release for compatible devices. This version comes with new features and changes to improve security, privacy, performance, and productivity.

The new update comes with a bug which may result in constant “Drive Full” notification. It is not a major bug and it is fixable too.

Users may face a problem because of a UEFI boot partition. This partition is always kept hidden as it is a part of Windows 10’s startup, security and recovery system.

The boot partition has been assigned a drive letter accidentally. But it is not much of an issue except the “Drive Full” pop-ups which may become irritating.

The partition here is pretty full and visible to users too, though they can’t do anything to damage it.

If you are trying to remove the drive letter assigned to it then it won’t work. One thing users can do is removing the drive letter using Command Line Disk partitioning tool known as “Diskpart” instead of Disk Management Console.

Users need to take certain precautions because Diskpart is an IT Pro-level tool and should be used with great care.One wrong step can result in complete re-installation of OS or can cost users their data by completely formatting the hard drive.

If you’re not very confident with IT, please do not attempt this fix yourself, instead ask a friend or colleague who is good with IT to do this for you.

Users can follow the steps given below to avoid that bug to bother you

  1. Open Command Prompt from the Start Menu
  2. Type Diskpart and click-through the UAC prompt
  3. If you have more than one hard disk in your PC,
    • a. Type List disk and note the number of the disk on which Windows 10 is installed
    • b. Type Select Disk N where N is the number of the Windows installation disk
  4. Type List Volume to see which partition has the offending drive letter. It will be a drive with a size measured in MB (Megabytes)
  5. Type Select Volume N where N is the number of the UEFI partition that’s been given a drive letter, in my experience so far it’s the one called “Recovery”
  6. Type Remove Letter=N where N is the drive letter (maybe D or E) assigned to the UEFI partition
  7. Type Exit to close Diskpart
  8. Close the Command Prompt Window

Once the above steps are done, the problem will go away immediately. Restart the machine once and you are ready to use without any Disk Full pop-ups (If none of the other partitions is full).

Make sure that drive letters entered are correct and perform this process with a clear mind. One wrong step can lead you towards wiping off your HDD.

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Source: Windows.Do

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