Toshiba Satellite--Preparing Automatic Repair

Last night, I booted my computer and got the Preparing Automatic repair message. It then said it was searching and repairing, and that this process could take over an hour. It ran several hours before I went to bed, and then I let it continue with this message all night. When I got up this morning, it was just a black screen. When I boot my laptop now, it gives me the Preparing Automatic Repair message again, and then goes to a black screen with an active cursor but nothing else after a few seconds. I would really appreciate any help!