BUT. Best practice is to reserve the overall Administrator
account for use when you have trouble with your system. It is your fallback in case your day-to-day account has problems.
User accounts can become corrupted, and it is so nice to have a fully functional Administrator
account to use when that happens. I suggest that you copy everything over from the Adminstrator
account to the new one, and use the new account for everyday.
This explains how to copy everything over from one account to another. Don't worry about the 'corrupted' part this time, it works just fine from fully functional accounts as well. http://support.microsoft.com/?kbid=811151