MacBook pro 13" 2011. 10.7.? 16gb. 500hd. Slowly been getting worse. This morning when I opened lid and I normally just put password in and straight in as I leave on sleep. But it totally restarted. I thought that was strange. It did the same thing 2 hours later. But 3rd time I pulled the power cable out before I pressed sleep mode and IT turned off. So thought maybe just the battery. 1 hour later I get home. Open lid and knowing it will start a fresh. So out my password in 10 times and it's not taking it. It's befoming annoying at this point. Then it just won't let me in at all. I tried other user. Then I had to put password in which was strange as I don't think it had one. No it's really bad. I had to restart as it would not let me go back To log in screen. Now it won't load up. It's just stuck on that grey screen with Apple logo and spinning wheel. That's all it's doing. Don't know what to do now. As like everyone I have a lot of work on here and other important files. What can I do? Please someone help me.