How to Fix Error in VirtualBox error “Failed to open a session for the virtual machine”
I have a virtual machine with Windows XP with a clean installation. I set it as immutable to create a differential machine, so I create a new virtual machine, select the immutable hard disk and create a new snapshot in the new virtual machine folder.
However, when I try to start the virtual machine I get this error:
"failed to open a session for the virtual machine".
What is the problem? until now I can use differential virtual machines without problems. I have installed the last version or VirtualBox v4.3.4 and the problem persists.
If I set the hard driver as normal and I create a new virtual machine and select this hard drive I
don't have any problem.