If it is a real warning, it is probably because the drive management subsystem has noticed and mapped around ever increasing numbers of bad sectors on your hard drive. A few are expected on every drive. A lot is bad, or if the few starts growing steadily that's bad. That means flaws in the surface have come apart and have introduced debris inside the drive that is slowing grinding up the surface...
Backup early, backup often.
I got the same message 3 years ago and ran Dell diagnostics which confirmed imminent failure. They sent me a replacement hard drive as computer was under warranty. Backed everything up and waited for failure. New hard drive is still in my desk as I write this on old hard drive Dell latitude