Thanks all. I've read all the posts, and find myself in the camp of Mr.Red insofar as the best system is the one you know, and I do prefer a computer-based mail client. Currently NEITHER web-based clients seem to work all the time. Possibly something to do with my ISP.

I didn't make clear that the Photo and Camera Wizard seems to have gone from the XP machine, too, and I can't find it on W10.
'Once is happenstance, twice is coincidence, three times is enemy action.'
I will try Thunderbird.
W10 is odd in that you have to search for programs in some cases. I use Paint to resize photos, but had to use Search to find it, as it isn't in the program list!
I'm fairly happy with W10 in the way (and the speed) that it works, and I have nothing on there that anyone could use against me if it WAS stolen. My gripe is that there seems to be change for changes sake, and as I'm really a nuts-and-bolts type, I believe that 'If it ain't broke, don't fix it.'

As an aside, years ago, when I was keen, I bought an ON-ON switch so that I could boot from either of two hard-drives, one W98 or one Linux. I never got around to setting it up. I found the switch whilst tidying up the other day. Another thing that I found was floppys for the Amiga!