ok here goes, i wrote a replacment Gui for the windows 2000 logon dialog box, it works replacing the default gina and by having AutoAdminlogon enabled and then entering the correct username and password into the registry when a user clicks on a username(looks somewhat similar to xp's logon screen). The two registry keys are DefaultUserName and DefaultPassword.
Now here is the problem, this works fine on most of the computers its running on. But some seem to develop a problem over time. The account that causes the problem has no password. But on the affected pc's when the logon fails and the windows 2000 dialog box pops up telling you that the username and password are incorrect the password box has characters in it.
I know these characters where not entered into the registry so where are they coming from.
I assumed this was my program causing the problems so i disabled it and tried a normal autologon but the problem remained. It just seems to be a side affect of long term autologon.
So basically i need to know why some of theses pc's start to develop this problem, how to reverse it, and how to stop it happening again?