I'm kind of freaking out. I was in the middle of defragging Dell inspiron 15 laptop running windows 8.1 64-bit and I had to leave and I accidently closed the lid, which shuts down my laptop. Upon returning to my laptop, I realized my mistake when I tried booting the laptop up, it turns on, but all I see is a blank screen with the cursor and the occasional flicker of the wifi symbol you see in the lock screen. I have no idea what to do, does anyone have any ideas? I have a recovery USB stick, as the laptop doesn't have a CD drive.