I cant see selection window or gumball

Hi im having trouble with selection. When i try to select something, i cant seem to see the window of selection. I can still select stuff but i dont know what im seleting because i cant see the window of selection. Similarly for the gumball, when i select something, i can see the gumball, however after couple of seconds, the gumball disappears until i hover over the objects it appears for 1 or 2 seconds and disappears again. Can anyone help me please.

Hello -

Please run the SystemInfo command in Rhino and copy/paste the results here.