Well, just seeing how it goes for the moment... but:
The driver I got from Acer must be fairly 'ancient' - it doesn't support DirectX 9.
The game was running poorly, kinda jerky and slow, but at least the cursor is stable now - always on top; not flickering and disappearing (well, not
so far anyhow).
Also I notice that now the slider positions for sfx and music levels are where I set them instead of at default position as they always appeared using other drivers.
Managed to find a
DirectX 9 uninstaller and rolled back to version 8.1.
Still slow to load (and some weird black vertical lines creeping across the b'ground in Main Menu). The game seems to play a little better, but not well enough for Kathy's comfort - sluggish and sometimes unresponsive to mouse clicks...
Renderer was still set to "OpenGl", so I don't really know why the DirectX version should make any difference tho it seemed. I set it back to "Default" and restored acceleration but it makes no difference.
I still have a couple more .zip driver installers to try...................
I just find it interesting that this driver does fix some things but, then, causes other problems. I haven't tested it long enough to be sure, but it doesn't seem to be quite so ready to crash.
Maybe I should ask Acer to update their driver. Hey?
Anyways..
If it comes to it and if posible, I might be quite prepared to get my graphics card changed for something other than Intel.
From the searching I did, that is one suggested solution; the problem being endemic to Intel graphics cards - but, generally, it seems, to models other than the one I have.