VirtualBox Cannot register the hard disk already exists

Solution 1:

I found a solution

File -> Virtual Media Manager -> Removed existing images (note, I removed them only from the registry).

I followed these steps.

http://www.webdesignblog.asia/software/virtualbox-moving-vdi-file-re-linking-guest/#sthash.1QOHeiw5.dpbs

After that I could update the path in the VM settings.

Solution 2:

It's possible to change the UUID on the VDI file using the command:

 VBoxManage internalcommands sethduuid <file.vdi>

It seems this command assigns a new "random" UUID to the file. No much documentation on it, though.

Solution 3:

1. Select File from Oracle VM VirtualBox Manager
2. Virtual Media Manager
3. Remove the file (highlighted yellow) from Hard disks tab.

Solution 4:

If there is no possibility to remove or change path to a hard disc file using Virtual Media Manager (in my case) then:

1. Open '.vbox' and '.vbox-prev' (if exist) files in any text editor.
2. Edit 'location' attribute of the element 'HardDisk' to your path, for example: "d:/VM/VirtualBox/Win10/Win10.vmdk" (screenshot).