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Hello and thank you for your question. I look forward to assisting you today. You can download Windows 10 and burn it to a DVD then use it to do a repair. I suspect the corruption most likely came from your computer periodically restarting? You should try to resolve that as soon as possible so you don't end up in an unrecoverable situation. Make sure you make a backup of all of your important data as well just in case. You could also connect an external monitor if you have one available to keep your computer from restarting.