Laptop wont boot past Toshiba screen

I have the Satellite c855-s5123. I shut it down and when I went to turn it back on it wouldn't boot past the initial startup screen. The Toshiba screen came on, it said it was repairing (i believe that was the word it used) the C: drive. It began counting up with % until 100% then went on to the blank screen (mine is pink) that always comes up when booting up. After that it turned black, then blue back and forth and never went on to boot like normal. I don't know anything about computers. The only thing I did after this was press control alt delete...when I did this a message came up that said "the instruction at 0x04fe9006 referenced memory at 0x0000001d. the memory could not be written" and an "okay" box to click. i clicked okay and it went back to switching from blue to black blank screen. I turned it off and on once again and this time it didn't have the repair C: it just went to the Toshiba screen then straight to the black and then blue once again. I have only had my laptop about 8 months and I take perfect care of it. I have no idea what is going on. And as I said earlier, I know nothing about computers. Any help would be appreciated!!

Try the Troubleshooting Assistant or the suggestions in this article.
What can I do if my Windows 8 laptop won't start?
- Peter

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