After you install a new updsate, an application on the computer fails to run. You need to remove the update.
What should you do?（）

Your portable computer has two 512-MB memory modules installed in the only two memory slots available.
You need to improve the speed of your computer.
 What should you do?（）

You delete content from a file named Speed.doc that is stored in the C:\Data folder. You edit 20 files in this folder over the next two days. You need to restore the version of the file that had the correct data. You also need to ensure that the other fiels in the folder remain unaffected.
What should you do?（）

You configure Microsoft Internet Explorer 7 with a Really Simple Syndication (RSS) subscription to MSN Entertainment on your computer. Your RSS subscription Web page fails to show the information that the RSS feed Web page displays from MSN Entertainment. You need to ensure that Internet Explorer displays the current content from the RSS feed.
What should you do?（）