Problem from using logonstudio

Yep no problem, transfatex.......Right pull up Logonstudio on your screen. Now hit the edit button on the skin you want to correct the user list. You will now see the Elements box on the right. Go down to User and then the first subsection is User Account. Click it and you will see a list of which the first item is Account. Click the little box on the right and it will open and show you all the positions you can select. Select the one of your choosing and you are nearly done. Save and Apply and you will then see your logon spring up in front of your very eyes and it should then be OK.

I can't do that. I have no way of logging in, so I can't get to logonstudio to do that.

Try rebooting in Safe Mode and you may have to log on as Administrator, then I would unistall the bad LogOn and select a different one or go back to Default...

press ctrl-alt-del at the logon screen. no need to go into safe mode. you should get the old style logon dialogue.