After my laptop shut off automatically because the battery power ran out (forgot to plug it in), I replugged it in and I saw that there was another account named "other user" (The username and password boxes are both blank). I ignored it and tried logging on my normal account and this message appeared:
The UserProfile Service service failed the logon.
User profile cannot be upload
So I ran it in Safe Mode, finding a pop up message saying C:\windows\system32\config\systemprofile\Desktop
I simply copied and pasted the Desktop in my Users folder to that folder. One problem fixed.
Having "tried" to follow the instructions in this guide: The User Profile Service failed the logon. User profile cannot be loaded. - Vista Forums
I cannot enable the built-in Administrator account because there is only one account on my computer and since I can't log on normally I tried running command prompt in Safe Mode and following the instructions to enable the built-in Administrator. I clicked Log Out and I can't find it... Now I'm stuck