I checked and I was running them as system tray version. What I hadn't realised is that they started up automatically when I booted up the computer but didn't show the icon in the task bar. I then went and manually started all 4 so had, apparently, 8 instances running in task manager
It actually got worse. I suddenly couldn't run any of them, kept getting a serious error report and they would all close.
I've given up and gone back to the GPU 3 System Tray edition. It's folding with no problems and actually gives me a massive bump in points.
According to FahMon, when they were running, each instance was giving about 237 points each for an average of 948 points. But they were very slow and I never managed to get any WU's finished. I calculated, at the speed it was going, that it would take over a week to finish the 4 WU's, so not very productive all round.
The GPU 3 edition has folded 2 WU's in 2 days at about 4 hours each. (I don't yet leave my computer on 24/7 - maybe in the future once I know a little more about the clients and how to get them to run and configure them). The 1st returned 1358 points and the 2nd 1352 and FahMon reports the current one as; and ETA of 19.27 which is 4 and 3 quarters of an hour, the PPD is 6525.8* and the credit as 1352. This will get better when and if I over-clock my GPU. I have already over-clocked my CPU from 2.66 up to 3.2
As you can see, this is way more productive in terms of WU's and points.
The only problem, and not really a problem, is that FaMon reports both the Client Type and Core as Unknown.
Thanks to all and anyone for the advice and help. I'm just annoyed that I had to lose the partial WU's I'd completed when I changed back. They were at about 7% each.
(p.s. just for my information, and in case I need it in the future, when I was looking at other clients and in particular the newer beta client, the instructions kept on saying things like add -config and -smp. Where and exactly how was I supposed to add them. I could never find out.)
Thanks