ignatzatsonic is right, you should prefer a
back up. In my case, I recently bought an
ACER netbook, it came with a
Windows 8 recovery partition, and some other manufacturer utilities. I haven't liked Win 8 so much to use it yet, and I didn't liked the idea of having 50 GB of space lying around in a recovery partition, and I never liked the
manufacturer choosing what's right for me, so I did a complete formatting, and installed my good ol'
Win 7 Ultimate against a lot of people advise
to not delete that partition (which is legit anyway, it's good advice too since that voided any warranty from getting Support). Right now I don't regret that decision at all, and I particularily had never the need to use at any point the recovery partition, lest any support, and I had Client Support before, and it's not that good anyway. I use
Redo-Backup by the way, it's really simple and friendly to use. But again, that's my POV, if you like to keep that partition by the manufacturer by fear of anything-can-happen-in-the-future, it's a good idea too.
RedoBackup:
Redo Backup Bare Metal Restore Solution GUI Backup Open Source GPL Recovery