Removed a Trojan from my wifes laptop, and now there is another Admin account?

After buying Norton 2010 to remove Trojan horses, there is a new administrator account on my wife's laptop named ASP.NET We can't figure out how to remove this user from her system. The new admin has reset several settings on the system, including the Microsoft Auto Updater. We do not want to do a system restore as it will cause her to lose over 3 years of pictures that can never be replaced of our children. If there is any way what-so-ever to regain control of this computer, please let us know so we can at least get her pictures off the system. Thank you.