Success - the dog-awful Adobe DC product is gone. So I clicked on 'End process' for each of these processes, and tried uninstalling again. I worked out that these must be background processes that are still running, so I used 'control-alt-delete' to bring up Task Manager, and when I looked, there were FOUR hidden processes still running! WHY does Adobe DC have hidden processes running, in the background, that I don't know about, and don't show up on my PC, on a basic PDF reader? This is in itself sinister. Really annoying - so having got rid of all of these I tried uninstalling, but got a message saying the programme is still active. (whatever that is) of course as it's multiple errors the message boxes stack up and obscure my desktop.
As last I've discovered how to get rid of Adobe DC - here's what happened: I wanted to uninstall as I got multiple error boxes on my desktop saying 'failed to connect to DDE server'.