Fix: Windows 10 v1803 creates an extra Disk Partition

Windows 10 v1803 April 2018 Update brought along a lot of new features and improved upon existing ones. However many users reported that it creates extra OEM or Recovery partition. It is basically a WinRE partition. They cannot be deleted straight away since they have a logical drive letter assigned to them.

This surplus partition is visible in the File Explorer as well as Disk Management and occupies disk space (at least virtually). In certain cases, the system starts with the notification that the disk is full. Moreover, upon checking Disk utilization in the Task Manager, you may find that it is almost nearing 100%, thus slowing down the system.

Windows 10 creates an extra Disk Partition

Windows 10 v1803 creates an extra Disk Partition

To fix the issue, try the following suggestions:

1] Hide the logical drive

The drive is necessary to recover Windows 10, but it virtually occupies space. We could hide the partition so that it doesn’t appear in File Explorer.

However, if you actually want to remove the extra partition, it isn’t possible through Disk Management. They don’t show the option for the same. You may need to follow these suggestions.

2] Using third-party software to delete it

While the Disk Management might not work, third-party Partition Manager software will be able to help you delete the partition.

3] Use Diskpart

You could use an elevated Command Prompt instead of Disk Management to shrink/remove the extra partition. Execute the following commands:

diskpart
list volume
select volume <the volume in the drive>
remove letter=X:
Exit

Here X: is the Drive letter.

This step will remove the surplus partition and resolve the issue.

4] Remove the MountPoint

Right-click on Start and select Command Prompt (administrator).

Type the command mountvol X: /D and press Enter, where X: is the Drive letter.

Hope this works for you.

Posted by on , in Category Windows with Tags
Karan Khanna is a passionate Windows 10 user who loves troubleshooting Windows problems in specific and writing about Microsoft technologies in general.

7 Comments

  1. William Blondel

    Thanks!

  2. arcu de triumf

    Ok but is it safe to delete it? Some IT guy told me not to touch it. I got G: oem partition 450MB with nothing in it after this update. Also with full disk notifications.

  3. The Lurker

    If you’re just removing the drive letter, the partition is still there and usable. Windows just won’t pester you about it anymore.

  4. gar-dian ?????????????

    Garbage info. Worse overreaction. But not surprised.

    The new service partition created by Win Update April 1803 is actually a WinRE Tool partition.

    Peer into it and compare the file dates. Then do the math.

  5. Karan Khanna

    Welcome!

  6. Step 3 is the correct (and ONLY) way to handle this. It does NOT DELETE the partition. It simply removes the drive letter (thus “remove”, not “delete”). You can shorten this by just saying “remove” instead of “remove letter=X”.

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