You are the administrator of 30 Windows XP Professional computers. The computers are not members of a domain. Users of the Windows XP Professional computers encrypt files on the local computers. A user named Stephen reports that he cannot remember his current password. However, he does remember his previous password. Before he changed to his current password, Stephen created a password reset disk. You want to ensure that Stephen can log on to his Windows XP Professional computer again, and that he can open the encrypted files.
What should you do?（） 

You are a help desk technician for your company. Your company’s network includes an Active Directory domain and Windows XP Professional computers that are configured as members of the domain. Company policy prohibits users from accessing their computers unless they are authenticated by a domain controller. However, users report that they can log on to their computers, even though a network administrator has told them that a domain controller is not available. As a test, you log off of your computer and disconnect it from the network. You discover that you can log on by using your domain user account. You need to ensure that users cannot access their computers unless they are authenticated by a domain controller.
How should you configure the local computer policy on these computers? （）