1. Open Backup and Restore Center by clicking the Start button Picture of the Start button, clicking Control Panel, clicking System and Maintenance, and then clicking Backup and Restore Center.

2. Click Back up files, and then follow the steps in the wizard. Administrator permission required If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Notes

* Do not back up files to the same hard disk that Windows is installed on. For example, do not back up files to a recovery partition.
* Always store media used for backups (external hard disks, DVDs, or CDs) in a secure place to prevent unauthorized people from having access to your files; a fireproof location separate from your computer is recommended. You might also consider encrypting the data on your backup.

This video Tutorial by Marc Liron will guide you on how to backup your data using Windows Vista.

View the complete video here.

Additional notes

Ever made some changes to a document then wished you had not? If you have, then you will appreciate Vista’s new Shadow Copy options. Shadow copies are very useful for larger documents or web pages. If the latest change you make to your web site stops it working properly, simply revert to an earlier version.