Hi,
I'm a new old Linux user (used Linux long time ago and now comes back to it !). I installed very easily F17 on my Macbook air (all hardware fully supported and working out of the box

Then I started to install additional softwares I needed including VirtualBox as I need Windows for few boring softwares existing only on it ! I installed Virtualbox easily downloading the RPM from Oracle, started it, imported my Windows system in it, everything goes fine.
Then I wanted to restart system and then it was the end

When system restarted, after Fedora logo filled, and when it's supposed to switch to graphic, I got a kernel panic (and could see among garbage text displayed that it looked to be while loading services relative to VirtualBox

So I made a hard restart and then had an issue with Grub and True Font (found solution about it), but then now my system boots in Emergency mode

How can I get out of that ? and thanks VirtualBox for having crashed my system that was working really nice
Thanks for help,
Vincèn