And remember, when you try running the FSCK as JBjorgen suggested, do not try to type the commands yourself by hand. Copy the commands out of the instructions (one at a time) by selecting the text in the web browser window, copying it with the Edit/Copy command, and then pasting them into the terminal program window.

You have already demonstrated in this thread (more than once now) that you tend to miss certain important things like spaces when typing your commands. The Linux shell prompt is very sensitive to that sort of thing, and you can actually do more harm than good by typing the commands wrong. For instance, in the FSCK instructions, if you accidentally type unmount instead of umount, things will not work as expected.

So please, for the love of God, copy and paste the commands instead of trying to type them in.