单项选择题 You use two user accounts for your computer： standard user and administrator. You log on to your computer as standard user but are unable to make advanced configuration changes. You need to make advanced configuration changes while you are logged on as a standard user.  What should you do？ （）

单项选择题 You need to configure the local security policy setting to request a user name and password when you make changes to the computer system.  What should you do？（）

单项选择题 You install Microsoft Windows Vista on a computer.  You will share the computer with another user.  You need to prevent the user from making unauthorized changes to the computer.  What should you do？ （）