VirtualBox Cannot register the image because UUID already exists

I’ve ran into a snag with VirtualBox. I made some images on my work laptop and when I try to load them on my home desktop machine I run into the following error: Cannot register the image ‘C:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso’ with UUID ‘{4a16c3ed-691e-4878-9576-d1113bc5a699}’ because a ‘C:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso’ with UUID {…} already exists It turns out the Guest Additions ISO is loaded for one of the images, but I have no idea which one since UUIDs mean nothing to me. Basically, the Virtual Machine won’t load and there doesn’t seem to be a whole you can do about it from the UI. After doing some digging I believe I have a way to get around the problem quite easily. Go into the directory where the Virtual Machine file is located and open the .VBOX file. It’s an XML and is easily read by an editor such as Notepad++. Look for the line: <HardDisk uuid="{4a16c3ed-691e-4878-9576-d1113bc5a699}" location="Windows 2008.vdi" format="VDI" type="Normal"/> as in this example: […]