Remove Driver Letter for OEM Partition

Hi Alexander, this is a known issue in the 1803 Update,

It is the recovery drive, you are not meant to see it, it is not meant to have a drive letter, remove the drive letter and everything will return to normal:

Click your Start Button, type cmd, then right click Command Prompt and choose 'Run as Administrator'

Run this command and hit Enter

diskpart

Run this command and hit Enter

list volume

Note down the letter associated with that new drive

Run these commands one at a time and hit Enter (replace X with the correct drive letter)

select volume X

remove letter=X

Close Command Prompt and restart your PC

Hi Alexander,

You will need to remove the drive letter and mount point in DiskPart.

Hit Windows key + R together to go into Run. Type in the following: diskpart

Enter the following in the new DiskPart window:

list volume

select volume NUMBERHERE
...or: select volume LETTERHERE

remove letter=LETTERHERE

Does not work after a reboot? Try entering this instead in an administrator session of Command Prompt: mountvol LETTERHERE: /D

LETTERHERE is the drive letter you want to remove, NUMBERHERE is the corresponding volume.

Source: https://www.reddit.com/r/Windows10/comments/8gj...

Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

I hope this helps. Please do let me know if this fixes it.