Windows guest should not be able to make the virtualization have a sigsegv.
You re looking at a bug in virtualbox. You might report it to them.
Virtualbox has in recent years also had driver bugs causing host kernel panics.
If you need graphics performance, then virtualbox wins, otherwise consider switching to kvm/libvirtd/virt-manager.
---------- Post added at 12:55 PM ---------- Previous post was at 12:50 PM ----------
Originally Posted by Katherine2046
so many people says that alway login as root is silly, but i haven't got any terrible things happened for many years, so i think it may be safe as this computer is mine and no body will use it but me. people around me can only know how to handle windows.
I have no objections to running as root, so long as you accept the responsibility to make no command typos.
whether the reason for the crashed windows is that the system think it is foolish for me to login as root ?
No - a guest OS malfunctioning should never cause the virtualization to take a sigsegv. That sigsegv means there is something wrong with virtualbox.