Sometimes you may want to delete an existing volume to free up space or for other reasons.
Various reasons can lead to this issue notification.
Now let us see how to get rid of this issue and delete your volume effectively.

How to Fix Virtual Disk Service Error Delete Is Not Allowed
Fix 1.
PressWindows + Ikey combinations to go to Windows parameters and selectUpdate & Security.
Move on to theRecoverysection in the left panel and clickRestart nowunder theAdvanced startupsection.

ClickTroubleshoot>Advanced Options>UEFI Firmware parameters>Restart.
Step 5. store your changes and reboot your setup from the selected boot partition.
Are your files get deleted when left-clicking?
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Fix 2.
Now you could download and install MiniTool Partition Wizard Pro to have a try.
MiniTool Partition Wizard DemoClick to Download100%Clean & Safe
Step 1.

Step 2.Boot from the created bootable media.
ClickApplyto perform all the operations.
Now the system volume should be deleted by following the steps above.
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However, what if you delete the wrong partition?
How to recover lost data on the deleted partition?
In this case, you might try a reliabledata restore toolto recover lost data on the deleted volume.

MiniTool Power Data Recovery, afree data recovery software, is the most recommended one.
Tip:MiniTool Power Data Recovery Free Edition supports 1 GB of data recovery for free.
To recover unlimited files, you’re free to choose MiniTool Power Data Recovery Personal Edition.

Whats more, this registered edition can help yourecover files when your PC wont boot.
This post explains how to stop Windows 10 from deleting files automatically and recover deleted data.
Here it’s possible for you to follow the steps below to have a try.

PressWindows + Rkey combinations and typesysdm.cplin the input box.
In the new window, move on to theAdvancedtab and clickSettingsunder thePerformancesection.
In the pop-up window, go to theAdvancedtab and click theChangebutton.
UncheckAutomatically manage paging file size for all drivesand checkNo paging file.
Go back to the Performance Options window, and pressApplyandOK.