Alright, will probably make a reinstall again if that won't work... Wanted to try to save the system at least because I already did a reinstall 2 days ago. Thanks anyway!
I have been trying to boot my Ubuntu installation, it used to work fine before but when I restarted it prompted this error message and I can only see a black screen with that text. After Googling around I saw there were other people with my same CPU and laptop model with the same issue. Thanks...