Laptop having a hard disk problem

Hello!
I have an HP laptop and i have installed windows vista in its hard drive . Whenever I try to turn the laptop on it gives me an option that either "start recovery" or something or "start normally" but when i click to start normally it doesn't start , i mean it restarts and says "Your hard drive may be infected by a virus" .
I think that there's a major hard disk problem. What does this mean????
Thanks for solution!!!
