I'm running Virtual box to run some MS-DOS machines, I find if I tag them all to launch at startup Virtual Box seems to trip over its feet, i end up having to kill it, restart, and launch the VM's manually.
So I need to either postpone all the launches until VB is fully up and running, or stagger the start of individual VM's to one at a time maybe.
A
According to the manual you can from the commandline, something like