Do you need help backing up your system, or dealing with the message?
Windows 7 has utilities that checks and repairs the hard drive all the time. Whether it is getting a Smart type of error or some error its utilities are creating, not really sure.
I think I would back up my data to start with, then deal with the hard drive problem.
Having an image backup is always a good idea, if you don't already. Then if the drive does fail, you can just re-image your system.