You should run regular defrags on you hard drives to keep your computer running at top performance. Please watch the video below to learn how to run a defrag (Disk Defgramentation.)
Here you can see the system properties. Just right click “Computer” and select “Properties” to view.
View the Vista System Properties Page
Here you can see the version you are running, as well as some performance information. The tasks section gives you some links to more advanced features.