Oh dear! I also have a disk read error on my Samsung laptop Model R519 bought Nov 2010. Many months now I have been trying to fix the problem & have tried the CHKDSK thing on You Tube but have not done a clean format & re-install yet. I am tempted to go out and purchase a new laptop but at same time I am challenged to learn how to fix this problem. I am not a technician but just an every day woman. Help! It will be a Big thank you! Please!