My laptop recently tried to update to windows 8.1, failed to update, and did some serious damage. Soon after that, my laptop started freezing, crashing, getting stuck in recovery loops. I just got it, and I didn't really have many files on it that I was worries about losing, so I decided to reformat it (they apparently now call it "resetting"). It took hours to get where it is, and I checked it when I went to bed and it was at 81%. When I got up this morning (about 7 hours later) its still at 81%.

I dont want to hit the power off because I dont know what state my laptop will be left in.
Running Win 8, x64
Model E1-731-4675
What should I do?