Hard Drive continues to run after shut down

[Guest]

After system shutdown there is clicking and flashing of lights on the face of
the hard drive sometimes for a minute or so and sometimes more persistently).
When I disconnect the power source the problems stops.

The clicking corresponds to the green lights "on the tower" to the left and
right of the ON/OFF button and at the light on the bottom left of the CD
drive.
I am trying to determine whether it is a hardware or software problem.

Has anyone else ever experienced this? Thank You.

 

[Guest]

Sounds like the computer is being put to "sleep" and not actually powering
down.