Depends on what you are thinking of backing up to.
If you are backing up to another hard disk then xxcopy or xxclone (depending on your OS) are free and can be downloaded from click here or click here
If you are backing up to DVD/CD then Nero 6 has a module called Backitup which I use to backup to DVD. I do also backup to a separate Hard disk about every 6 months using xxcopy. The hard disk is then taken out of the pc and stored.
As pj 123 says it all depends what you wish to back up.
I have tried most over the years and have found the best most secure is the full image backup, such as Drive image or Ghost. A single disk can be partioned but much safer to fit another drive. I have piece of mind that what ever happens I can have a full exact system restore back up and running at the touch of a key in 30mins.
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