Hi ElleMorrison.
I'm David, and I'm happy to help you.
Use the Recovery Environment to repair the system.
Use the Start-up Repair.
- Select "See advanced repair options";
- On the Choose an option screen, select "Troubleshoot > Advanced options > Start-up Repair".
If it persists, use System Restore to get Windows to the point where it was working.
- Select "See advanced repair options";
- On the Choose an option screen, select "Troubleshoot > Advanced options > System Restore" and follow the onscreen instructions.
I hope this helps. Feel free to ask back any questions.