i am so dumb

So! I finally got some time this evening and decided to rip open my laptop and replace the hard drive, something I've been meaning to do for a year. Well, it all went swimmingly, right up until the point when I did an update on the new drive, and hadn't bothered to screw everything back together. Impatient, I was going to put the bottom screws in at the same time, and er, pulled the power cable out, forgetting I had no battery in. Jesus. Old disk is back in now. Back to square one. I feel a little bit like killing myself.