Thanks. I skipped past that post not making the connection that W-10 was in fact a reference to Windows 10
I'll create a Macrium Reflect system backup first and then will give it a try.
Incidentally, that's a good programme for re-storing hard drives in the event of a drive or system problem if anybody is interested, and its free.
I've used it lots of times and its always restored without fail.
Thanks again for replying.
Update. Installed 2012 fine and appears to be doing what it should.
I've ripped a CD to MP3, captured a Vinyl Record and burnt a data DVD disc. All good so far.