Just turn on my laptop today and i got black screen with cursor only, no login screen appear for about couple of minutes, i notice the HDD indicator on but still black screen, i can move my cursor but cant press ctrl alt del. So i force shutdown by hold power button and my laptop shutting down. Then i turn on again everything back to normal. Yes everything is fine but my brain cant stop thinking, about those black screen, is it fine ? do i need to worry about it ?