I appreciate replies, thanks.
mixture,
So basically you're not doing a backup.
I guess I have to agree with that! However to clarify, I was referring to the Windows back up which I think is only backing up system drive C. I don't know what is being backed up there or how useful it could be. It seems to be spread all over the place.
I do, however, manually back up my important docs and pictures on the D drive as you suggest, so in this instance I do know what I'm backing up. Thanks for making the picture clearer, perhaps I'm not so far off with strategy! Just a bit nervous about updating the drivers just to run Minecraft with no guarantees. Cheers.