VirtualBox import error Cannot register the DVD image

Question

I\'m running v 4.2.6. Starting this morning, I can\'t import some VMs, and some of my existing VMs are showing up as inaccessible and have the following error showing in the UI,

Answer 1

I solved it by open the file win 7 64.vbox with text editor and remove the tag:

Know that by removing the tag it will be added as empty tag. and reopent the vm of virtual box again. and it worked