OK Mr Zippy, I have posted this problem on Simviation. I did so here in the hope I'd get something understandable.
"Control Panel-> Administrative Tools-> Event Viewer, select Custom Views-> Administrative Events.
One of the listed events will be for your CTD. The "Faulting Module" should point to the problem area."
Is your advice. I can get as far as 'Administrative Events' Where I see a whole lot of errors and warningd but none of them 'point' anywhere I understand. What's a CTD, and what's a faulting mobile - that sounds like the old cars I used to own when I was young!
All I'd like to do is completely wipe FSX from my PC but that seems impossible, uninstalling it seems to leave a lot behind and doesn't cure the blank screen when reinstalled.
I know it's a pain but I would appreciate advice an idiot like myself can follow.