Display issues

Hi

I recently moved to SW 2012 x63. When I open a part/drawing/assembly SW opens it but the displays it incorrect, see image below. I cant drag the window to display over the whole area. The size ov the display area also varies from full screen to almost nothing. It resizes after every action, aka after I extrude or draw something. Has someone seen this? What should I do?

Thank you

Joachim

SolidworksGeneral