Hello, I am using Ubuntu 11.10 32 bit. Yesterday, my computer had some line error during boot-time, showed EXT4/fd (sda1): previous I/O error to superblock detected (screenshoot : http://i.imgur.com/TMow5UU.jpg). On this condition, my compie still could reached Desktop, but then, my Desktop showed a dialog window with unreadable-character, (screenshot : http://i.imgur.com/YmljPwk.jpg). After that, it wouldn't show the Unity and some shortcut folders on Desktop became unknown-file-like (screenshot : http://i.imgur.com/OJJZvC2.jpg).
Could any body tell me what is this and how could I get rid of it?