Windows 10: Windows 10 - drive letters not available

Hi,


I have the following odd situation...


Introduction:


I did a clean install of Windows 10 Pro on one of my PC's. I used the iso of v1709 (Windows 10 Fall 2017) because that was the latest iso I had available on CD. In the mean time the PC upgraded to v1803 (Windows 10 Spring 2018).


The PC has one SSD and one HDD, I installed Windows 10 on the SSD. During the install I removed all existing partitions.


Odd situation:


After the clean install I wanted to assign drive letter D to the unallocated HDD partition within Disk Management, but drive letters D, E, F, G, H are not available within Disk Management. When I checked in Computer\HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices these letters have been assigned already while no USB or other devices are connected. Within Computer\HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices I removed D, E, F, G, H because I was sure these should not be there. After a reboot I checked the registry and they were back?!?


Question:


Does anyone know why device D, E, F, G, H appear in the registry. I want to assign D to my HDD because that's my PC best practice: C for Windows and D for user data.


Thanks in advance,


SJW

:)

 

help. USB drive isn't assigned a drive letter.

Any usb flash drive I plug into my computer isn't assigned a drive letter. The physical drive shows in the "safely remove hardware" but it doesnt show up in disk management. I have tried to populate the volume thru the safely remove hardware properties window and it does pop up in the list but it doesn't stay there. This isn't a format or assign a letter problem. It's more complicated then that. Maybe one of the services needed for usb drive management was disabled? Suggestions needed. btw external usb harddrives work fine.

 

Drive Letters not available

Hi,

Thank you for posting your query in Microsoft Community.

Sorry for the inconvenience caused.

If the letter E is not available it may be because it’s being used by any other drives. we can see from the screenshot which you have provided that the E: drive is used by DVD/CD-ROM.

If you want to assign E to Another drive you may have to assign DVD drive to any other letter which will free up the Alphabet E.

Please follow the steps to change the drive letter:

1.Right click on the start button and select Disk management.

2.Right click on the drive which you want to rename and select change drive letter and paths.

3.select the drive from the list and press apply and ok.


Hope the above information helps. Reply with necessary information and the result to help you further. Thank you.

 

Drive Letters not available

I just upgraded from windows 7 pro to windows 10 pro and many of my drive letters were changed. I can't change them back using disck management because the letters I need are not available to select from. All of my applications point to a drive "D" and
that letter is not available. Only letters available are: I, L, M, N, P, Q, R, S, T, & V.

This needs to be fixed, I can't spend lots of time reconfiguring my programs and shortcuts to point to a new drive letter.