Consider the following scenario.

• On a Windows Vista-based computer, you log on to an Active Directory domain in a forest by using a user account in this domain.
• The Windows Vista-based computer belongs to another domain in this forest.
• You lock the Windows Vista-based computer.

In this scenario, you cannot unlock the computer by entering the account password.

This issue occurs if the following conditions are true.

• You configure the “Assign a default domain for logon” Group Policy setting, and then you set the domain to which you log on as the default domain.
• You log on to the domain from the Windows Vista-based computer by entering the user name without including the domain name.