Another "failure mode" of VirtualBox people should be aware of: I understand through good sources, Oracle monitors the IP addresses that it's downloaded from, and if they can trace it back to a commercial IP (i.e., not a home address), and if they see you download (or update) the "not for unrestricted free use" parts, their lawyers will contact you and send you a bill...and they really don't care about "for work" or "not for work related" uses.
I'd really recommend removing this product from your computers. Nick.
