Windows Xp Welcome Screen / User Logon

I recently upgraded to windows xp professional from windows me. I was not having any problems when I started the pc until after I installed the .net framework updates from the windows update site. Now when I start or restart my pc it starts with the administrator setup instead of the way it had been. I need to go to start/log off and select switch user in order for it to switch to the way that it had been prior to the .net framework updates.I tried going to the control panel and selecting the user account and selecting to change the way users log on or off and both the "use welcome screen and use fast user switching" are checked off. I am listed as a computer administrator but there is also a user account titled administrator which is also listed as a computer administrator.The administrator account is the one that is automatically opening now when I start the pc but I want it to open to the user which is me (and that is how it was opening prior to the install of .net framework).

I also tried going to start / run / control user passwords2 on the user accounts I removed the check mark from the box for "users must enter a password to use this computer". I then selected okay to the automatically logon box that popped up with my user name. I did not enter a password since I never entered or had one to begin with. I then clicked on okay..I then tried going to control panel / user accounts and then to change the way users log on and off and unchecked the box for both "use the welcome screen" and "use fast user switching". However when I clicked on okay I get a screen that states that "fast users switching cannot be turned off while multiple users are logged on. Make sure all other users are logged off, then try again." Does anyone know how I can get Windows XP to open/start that way again without having to always go to start /log off and selecting to switch users all the time?