Danielle, Here is another couple links that may help you trouble shoot/get rid of black screen after windows upgrade. Check the attached link,instruction and guides. Some of the forums say black screen may be because of graphic card issue. Good luck
I hope this helped you out, if so let me know by pressing the helpful button.
https://support.microsoft.com/en-ca/help/14106/windows-10-troubleshoot-black-screen-problems
http://www.tenforums.com/general-support/10457-fix-windows-10-booting-black-screen.html