OT: Hard drive warning at boot time

[Paul Smith]

Dear All,

Today, I am getting this message at boot time:

"Notice - HD self monitoring system has reported that a parameter has
exceeded its normal operating range.  Dell recommends that you back up
your data regularly.  A parameter out of range may or may not indicate
a potential Hard.    Press F1 to continue , F2 to enter setup"

Is there any reason to be worried about?

My computer is about 3 years old.

Thanks in advance,

Paul