Problem i can't see what i do in Rhino

Hi, I open Rhino and i first don’t see the central cursor (the white one which is the center of the Black lines cursor), then i try to create a polyline and i click to see what i am doing and nothing happens but on the task bar i really create this polyline. When i decide to close the software, i can see the line but every views are blocked, i can’t see anything i can’t rotate around… I don’t know what i have to do.

Hello - please run the SystemInfo command in Rhino and copy/paste the results here.

-Pascal