Ok thanks Gabriel! I havent tried that yet but I will if I need to. I just wanted to let everyone know I stumbled across a fix by accident. (I'd love to be able to say I was clever & thought of it but I can't tell a lie)
It all started when a massive thunder storm hit and killed my computer all of a sudden. When it started back up the safe mode option was up & I chose to start in safe mode with networking. I was tooling around checking things when I suddenly thought "hey I wonder if that bloody Affinity program starts in safe mode!!!"
So I launched Photo & after a while it popped up a message along the lines of "This Program requires DirectX 10 to operate and you do not have a compatible graphics card.We have fallen back to a software implementation to get it to work but it will not be at optimum speed unless you get a new graphics card" I clicked ok. Then the consent screen popped up & didn't disappear immediately. I ticked the box for yes & it launched as normal.
I restarted in normal mode & launched Photo with ZERO problems.
Tried Designer & it would not launch. Was doing the flashing up the consent box etc
So went back into safe mode, went through exact same thing as Photo & now Designer launches fine too
I have not tested either of them for functionality & speed since then nor do I know how they will go after next OS upgrade but for now that's fixed the problem so hopefully that will help others.
I have Direct X 11 installed, by the way & NVIDIAQUADRO FX 3800 graphics card
If I have further problems I'll give Grabriels idea a try
If anyone has info about why the graphics card is not compatible & whether or not I actually need to replace it that would be helpful
Thank you to everyone who offered suggestions. What a performance this has been but now I can get on with some work & try to catch up with the backlog.