Here's my experience with backup software.
I'll preface this with what I intend to use it for:
I make a complete identical copy of the HDD so that in the event of failure I can just swap out the drive to my most recent backup and continue business as usual.
This is the C drive I'm talking about, the one with Windows on it.
Years ago Acronis True Image would allow you to do this but a few years ago they changed their software and AFAIK you can't do this anymore with their new versions.
I wasn't aware of this and was under the false assumption that my C drive backups would work as I stated above, but that's not the case.
If you swap the HDDs over, Windows won't work and will give you errors.
D drives or data drives are fine, only the C drive (Windows) gives this error.
This is when I ditched Acronis altogether as I was sick of their upgrade policies and pricing and that I couldn't reliably duplicate (ghost) my C drive so that it would work when swapped out.
In my research I came across Macrium, which, from their blurb indicated that I could achieve a C drive duplication as stated above.
Same problem, when I would swap out the HDD, Windows would give an error stating it wasn't a proper copy of Windows or something like that.
I can't remember the exact error now it's been a few years.
The only Backup software I found I could reliably do this was with a free piece of software called Clonezilla Live.
http://clonezilla.org/clonezilla-live.php
With this program I am able to duplicate my C drive (even on my laptop) and swap drives reliably without any Windows errors about "non Genuine Windows" rubbish.
Clonezilla is not a 'pretty' program to use but it is reliable for cloning the C Drive.
With my laptop, I'm able to clone the C drive to a larger capacity drive and keep my original as backup.
With Laptops you need to take out the original C drive and put the new drive in its place then run Clonezilla from a CD and copy your original C drive (as an external source) back onto the new 'internal' drive for Windows to work properly.
Here's the steps for this procedure:
Anyway, I'm far from a tech guru and am quite happy to be corrected about getting a working Windows C drive duplicated as a reliable backup.
If you're able to use Acronis or Macrium to reliably swap out C drives let me know but AFAIK only Clonezilla does it without 'Windows Genuine' errors.
Phil (acropolite) I haven't heard of Cobian, I'll have to check it out, thanks mate.