OK!! Changed my screen resolution to 1024 x 768 from 800 x 600 . Also updating to DirectX 9.0 from 8.1 will help.
So for others with this problem, (text broken up) at least in my case with a older & slower computer it was the anwser. When I am not in the OOTP5 game, just go to Control Panel, then click on display, reset your settings back to your original choice for normal use. Only takes a few seconds.
You may also have to disable 3D.
Hope the helps.