Your network consists of a single Active Directory domain. All servers run Windows Server 2003 Service Pack 2 (SP2). All client computers run Windows XP Professional Service Pack 3 (SP3). A domain user named User1 attempts to log on to a computer named Computer1. After several failed logon attempts, User1 receives the following error message. You reset the password for User1 and provide the new password to User1. You need to ensure that User1 can log on immediately. What should you do? （）

• A、Modify the Account settings for User1.
• B、Modify the Session settings for User1.
• C、Disable User1 and then enable User1.
• D、Disable Computer1 and then enable Computer1.