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?（）

You have a computer that runs Windows Vista.
You need to collect performance data on your computer for a period of four weeks. The performance data must include CPU utilization, memory utilization, and disk utilization.
 What should you do?（）