Almost all versions of computers need to be backed up. The two that have been very robust and offer good backup and cloning solutions are:
Reflect Disk Imaging: http://www.macrium.com/reflectfree.asp
Paragon Backup & Recovery Free Edition: http://www.paragon-software.com/home/db-express/download.html
These are the ones that offer very good flexibility as well as allow you to make bootable disks.