I'm using VirtualBox 4.2.16 on Windows 7. I'm already successfully using several Virtual Machines, however I've now downloaded an image for an old version of CentOS from www.virtualboxes.org - unzipped it, got the
.vdi file, followed the instructions for installing a new HD, and then get the error
"The hard disk storage unit at location <location> already exists. You cannot create a new virtual hard disk that uses this location because it can already be used by another virtual hard disk. Please specify another location"
What am I missing?!