C:\Users\username\VirtualBox VMs

The subdirectories of C:\Users\username\VirtualBox VMs seem to correspond to VirtualBox guests.

Among others, these subdirectories contain

• hard-drive.vdi
• <vmname>.vbox
• <vmname>.nvram
• Logs\VBox.log
• ‥VBOXPOST.CMD (which seems to be a (modified?) copy of → Windows/dirs/Program-Files/Oracle/VirtualBox/UnattendedTemplates/win_postinstall_cmd)
• ‥autounattend.xml (which seems to be a (modified?) copy of → Windows/dirs/Program-Files/Oracle/VirtualBox/UnattendedTemplates/win_nt6_unattended_xml)