单项选择题
A.Use the Previous Versions feature to restore the files and folders.
B.Use the System Restore feature to perform backup and restore operations.
C.Use the NTBackup utility to back up and restore individual files and folders.
D.Use the Backup and Restore Center to back up and restore files.
单项选择题 You need to back up the existing data on a computer before you install a new application. You also need to ensure that you are able to recover individual user files that are replaced or deleted during the installation. What should you do？（）
单项选择题 You share your computer with two users who belong to the Users group. You need to ensure that all users are informed of new updates. What should you do？（）
单项选择题 After you install a new update， an application on the computer fails to run. You need to remove the update. What should you do？（）