Computer will not boot no matter what

I was working on my computer earlier today and suddenly found that I couldnt interact with any of my programs. I could click on them in the Taskbar and they would come up, but when I tried to click on anything within the programs they would act as if I had a different program selected. I saved my work and restarted my computer.

Now every time I try to start my computer, I get to a loooooong "Starting Windows" screen, and if I sit through it (5-10 minutes) I get to a black screen with a cursor where I can't do anything. Startup Repair doesn't work. Safe mode doesn't work. Low resolution mode doesn't work. Taking out the battery and putting it back doesn't work. I'm running out of options. Help???

I have a Lenovo IdeaPad Y580 running Windows 7.