Is there a way to "preselect" a certain user on the Windows 7 login screen?

Solution 1:

This has been answered previously on social.technet.microsoft.com and unfortunately, the answer seems to be No.

Logon screen shows the user accounts in alphabetical order based on the names first given to the account when it is created. If you change the user account name later, it does no longer change the order accounts are presented. Reason is simple: even if you change the user account name later, the user account folder keeps the original name. Renaming the user subfolders in C:\Users does not change the situation.

What all this means is that you have to think the logon screen account order already when creating accounts.