Wow surprised nobody has answered this easy question yet. Your computer is informing you that your hard drive is coming to the end of it's life. You need to save the data on your hard drive that you want to keep to a CD, external hard drive, USB, or some other media. After which point, you should probably get a new hard drive to replace your one that's going to fail.
There is nothing else you can do. The hard drive is going to fail... no if's and's or but's.
Wouldn't really suggest buying a whole new laptop though... much cheaper to just replace the hard drive.
(best option) or www.tigerdirect.com
(second best option) for a new hard drive.