Okay, I turned off my windows HP last night, everything was fine and usual. Today I came home, turned it on and everything was missing. My account didn't exist, my pictures were gone. Everytime I click on a downloaded program that I had previously it says there is an error and to try downloading again. So I try and it gives me another error. I tried to reboot it and I also tried to restore it and it said it had nothing to restore. I don't know what else to do. Please help!

So Windows loads up ok?