I have found quite a few topics within this problem, but didn't really find a clear answer. I have updated my Ubuntu. The update I have installed Ubuntu update center said it had some unothorized installs. I have read, that people get these messages, but what you need to do is run sudo apt-get update and then sudo apt-get upgrade. So that was what I did. After I restarted the computer, I received this "Internal system problem". Tried to restart computer quite few times, but still the same. The thing is that I can not see the desktop as well, no icons, no nothing.
A first attempt, the way would try personally:
Do you get a login prompt if you hold
SHIFT and hit
F1 ? - if that is not possible, try to get into 'Recovery mode' from the grub menu (hit ESC immediately at the end of BIOS displays to see it, if it isn't shown automatically).
In recovery mode first do
enable networking, and finally
After either of the above try
sudo apt-get check at the prompt.
If that goes well then follow up with
sudo apt-get update (will scroll a lot of text) and
sudo apt-get upgrade.