Ok, so my computer will boot up fine, but then it gets to the login screen, where it's completely black except for the cursor, the Restart/Shutdown button, and the Ease of Access button.
This is the same in Safe mode.
Startup repair could only be run as a standard user because for some reason, my only admin account (that I dubbed "Superuser") is missing. I only see my standard account (dubbed "Goku") and "HomeGroupUser$".
Startup repair didn't detect any problems.
What are my options?