How to Delete Virtual Machine from VirtualBox?

[thebromoe]

So I am currently trying to remove and delete an Ubuntu VM from my 'VirtualBox VMs' folder. I was able to remove the VM from my VirtualBox Manager,
however, when I try to delete the actual VM I get an error saying:

"The action can't be completed because the file is open in System
Close the file and try again."

I looked at many sources online but none were helpful.

I am on windows 10 and this VM and partition are on my C drive and there are no other drives on my pc.

A photo of the error is attached. Any help or suggestions would be appreciated. Thank you so much.

[Martin]

I had a similar problem some time ago on a system over here without Vbox.
My colleague accidentaly did a double click on a vhd and Windows mounted it.
Check in Windows disk management if there is a corresponding virtual harddisk and unmount it there.