How to Backup and restore your system files in Windows 7
Worried about a hard drive failure? Or a virus that destroys your operating system? Well, don't worry… Windows 7 lets you backup and restore your Windows 7 operating system and all of the files and folders you choose.
Backup and Restore—improved for Windows 7—creates safety copies of your most important personal files, so you're always prepared for the worst.
Let Windows choose what to back up, or pick individual folders, libraries, and drives yourself. Windows can back up files on whatever schedule you choose—just set it and forget it.
You can back up to another drive or a DVD. And if you're using the Professional or Ultimate editions of Windows 7, you'll also have the option of backing up your files to a network.