Steps
Backing up the entire computer
Click Start and enter the Control Panel.
Click the System and Maintenance tab, then select the Backup and Restore Center.
Click "Back up computer" button.
Choose where to backup your data in the drop-down box and click Next.
Click the "Start backup" button after confirming your backup settings.
Backing up files and folders
Click Start and open the Control Panel.
Click the System and Maintenance tab, then Backup and Restore Center.
Click the Back up files button.
Choose where to backup your data in the drop-down box, then click Next.
Select appropriate categories on the Which file types do you want to backup? page, then click Next.
Select frequency, day, and time on the How often do you want to create backup? page and click Save settings and start backup button.
Tips
The data backup will take place in the background without affecting your work in any way.
Backing up entire computer can not be done to same drive you are backing up.