At Bootup Your Key Is Invalid Please Activate It

On Bootup of my 32 bit Win XP, I get a BD message on the BD's compass rose "Your Key is Invalid Activate it". There is a great deal of disc activity at this time, and the message disappears & all is sweetness & light. My query is :- is this a symptom of a problem, or is it something to be lived with? I'm new to BD, and have no idea whether this is normal.