Back with Oracle’s Virtual Box 4.3.14 version release, it had some new security enhancements that broke things bad. Really bad. As in I can’t launch my VM’s any more bad.
I rolled back to 4.3.12 and was fine again.
Here’s the drama for the curious.
- 4.3.14 conflicts with anti-virus packages. - virtualbox.org
That eventually got resolved.
- VirtualBox fixes startup problems with Windows hosts, squashes more bugs - Betanews
- Windows 4.3.16 specifically for errors due to security - virtualbox.org
Today I downloaded and installed the latest current version (4.3.18) and all my VM’s are running fine with this version.
So there you go. Better late than never I suppose.