it depends what operating system you have and what devices available in your machine.
for example if you have Windows XP then you can use the backup feature installed into it and you can back up into another hard drive or into CD-R/DVD-R.
you have a good sense for baking up, you won't believe how quick the hardware fails especially if it is at constant use, in particular had drives.
There are other methods like mirroring and arrays which are complicated and needs extra devices to perform that opration.
Please feel free to ask if anything is unclear but it would be easier if you could let me know of some information on your PC first.
hopw the above answers your question.
Edited by samiko, 28 June 2005 - 12:51 PM.