VirtualBox -Cannot Register the Hard Drive Because a Hard Drive with UUID Already Exists

http://www.bradleyschacht.com/virtualbox-cannot-register-the-hard-drive-because-a-hard-drive-with-uuid-already-exists/

This is how you solve the problem of not being able to open an image from VirtualBox. The error should look like this.

Go to the C:\Program Files\Oracle\VirtualBox> directory on the Command Prompt.

Then type the following command. Remember that the path of the image has to be correct. And remember to use the " " also.

Command:
VBoxManage internalcommands sethduuid  "C:\Program Files\Oracle\Windows XP\Windows XP.vmdk"

Your output should look like this.