Its a win 7 up to date machine... quad core 6790ati etc... There are a few topics on this subject already, also something on this subject on the tech info here
http://www.avernum.com/avernum4/techsupp.html
It suggests running A4 before anything else starts running on the pc. Nothing seems to work, ive played with graphics setting on the desktop and shut down all other program i can.
Only lags when writing is displayed on screen, i.e. hitting things and when people talk.
It didnt really bother me until i got to Fort Draco, where everyone is idly chatting. Really bad slow down.
I was hoping someone had found a work around. Probably somthing to do with open gl, sadly win 7 doesnt let you disable it.