...I think a lot of my problems may be due to having copies of my FS 2004 on different Drives and Partitions in the same Computer...(don't ask me why!...

...)...!
My Registry and Graphics Card must get very confused at times!...

...!
I have un-installed all all the duplicate copies, except the one on my Main "C" Drive, which I have re-installed completely.
I now have to pick up all my add-ons, etc, from the copies, and install them, one by one, on my main Drive again...
I feel the Sim should run much smoother then...

..!
...all going well, so far...

...!
Paul...G-BPLF...FS 2004...and Clones of myself...be very afraid!....

...

...!
Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.