First, I had already renamed the user through the wmic command earlier in the thread, and the administrator account was already activated. So, I went and deleted the SID and restarted.
First, the account is still listed when I get to the logon screen. Second, when I log into the admin account I still can't access the control panel or anything like any other accounts that I've tried to create. Third, after trying to log back into the account that's still there, I'm guessing since I deleted the SID key, I no longer can access the command prompt or anything on that account, either. It looks like the computer is not making any SIDs at all when a new account is logged in. But, now I can't even do anything through the command prompt, so I think my only real option is to go with a clean install.