You manage several computers that run Windows 7. A user wants to roll back a driver. The user opens thedevice properties in Device Manager and discovers that the Roll Back Driver option is unavailable. Youconnect to the computer by using Windows Remote Assistance. You need to roll back the driver to itsprevious version.  What should you do first?（）

• A、Add the user to the Power Users group.
• B、Right-click Device Manager and select Run as administrator.
• C、From System Properties， modify Device Installation Settings.
• D、From the Local Group Policy， modify Device Installation Restrictions.