I *do* use NOOBS each time. I used Win32Imager to make backup copies of NOOBS from each of the SD Cards before I started, so that I could restore the SD Cards to their original pristine state by writing those backed up images back onto the SD Cards again using Win32Imager. Whenever I put a new, pris...

Do you mean that in RPi1 I should try an SD Card onto which an OS has already been installed (using RPi2)? If so then yes I did try this with RaspBMC and it seemed to work. (I say "seemed" because I have not used it extensively.) But nevertheless, whenever I try running an actual NOOBS process of in...

Two new RPi's each with a bundled 8Gb SD Card with NOOBS (bought in December from RS Components but not used until 2 weeks ago!) I labelled them as RPi1 and RPi2, and as SDCard1 and SDCard2. I then took separate backup copies of NOOBS from the SD Cards using Win32DiskImager. After an abortive instal...