Removing Old Drive Letter Assignments

  1. Posts : 2
    Windows 10 Pro

    Removing Old Drive Letter Assignments

    RE: Dell Optplex 3020
    Windows 10: Version 10.0.18363 Build 18363

    Have a small problem and I am going in circles..

    I was moving a HDD and the DVD drive around so that I could get the HDD on D and the DVD on any other letter (Needed D for something else that I could not change). Found out something. Windows doesn't want to let go of a drive letter even if the drive is no longer installed.

    Finally, after trying partition programs, and others, reading a lot on the screen, I finally took a look in the Registry. There they were, drives that were active, and drives that were removed a while back. It was showing the D drive.

    I need to assign D to the HDD due to a older program that, if I replaced it, it would be $$$, but only likes D. Any ideas, help, thoughts, or whatever would be greatly appreciated.

    Thanks in advance,

    Rich G
      My Computer

  2. Posts : 1,867
    Windows 10 Pro 2004 20H1

    Try going to Device Manager, click on View and select Show Hidden Devices.

    Devices that were once connected show up with lighter icons.

    Right-click and select Properties to confirm it is not connected.

    Then, simply uninstall the device.

    There is also a freeware tool called Device Cleanup that will do it all for you.

    Tools for Windows
      My Computer

  3. Posts : 3,677
    Windows 11 Pro 64 Bit 21H2

    Press the Windows key+X choose Disk Management. In the lower pane you will see all of your drives. Right click the D: drive and choose Change Drive Letter or Paths.and choose any drive letter not being used. That will free up D: and you can now right click any other drive choose to Change Drive Letter or Paths and choose it to be D: Once you reboot, it will permanently assign the drive letters. This can also be done with a 3rd party Partition App like Minitool. Partition Master.
    If that fails, you can reassign it in the Windows Registry To Change or Remove Drive Letter Manually in Registry Editor
      My Computer

  4. Posts : 61,836
    64-bit Windows 11 Pro for Workstations

    Hello Rich, and welcome to Ten Forums.

    You could use option 5 or 6 in the tutorial below to remove driver letters of previously connected drives.

    Remove Drive Letter in Windows 10
      My Computers

  5. Posts : 2
    Windows 10 Pro
    Thread Starter

    Removing Old Drive Letter Assignments

    This is the solution that finally worked. Got it from an advisor at Microsoft. (D is the desired drive. DVR drive can be any other)

    Go to HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices. Search for the drive number. You will wind up on a page with all active drives displayed.

    Check and see if the D drive is there. If so, do not delete--change the drive to the one you want to use as D. You may have to move whatever is on D prior to going here in the registry. Here is where I made the mistake, I did not look at the commands, I just deleted.

    Thanks for all your comments and help.

    Stay safe.
      My Computer


  Related Discussions
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 03:14.
Find Us

Windows 10 Forums