well administrator is administrator you usually are not suppose to use that account unless you want to change something around the system while in safe mode.
Limited means you have no permission to install programs or change system settings. I just made a limited account for my little sister because she always $crews up my laptop while playing with it so now she wont mess it up.
this is what you should do:
once you turn on your computer press your " F8 " button to choose " Safe Mode " > now log in as Administrator > go to controls panel> click user accounts> click on Limited (ur account)> now click " Change my account type" > select " Computer Administrator " .
Now log off and you can now use that account as if your the administrator.
or if you want to delete it then delete it while log on Administrator in Safe Mode
Need Help Deleteing An Account! 
Linear Mode
