Sketchup drawing freezes on saving

Technical Problems SketchUp
1

Every time I save a drawing my drawing freezes. The toolbars stil work, but the drawing can’t be changed, and if I chang to another program and back I see the screen of the program I changed to in stead of my drawing. The problem existed in Sketchup 2013, and are stil there after uninstalling Sketchup 2013 and installing 2015. The type and size of the drawing don’t seem to matter.
Only thing I can do is close Sketchup, start Sketchup again and open the saved drawing.

I have laptop with windows 7 starter.

2

I tried to solve it for a long time before posting this question, but as ever: just after posting I found the solution: I unselected “Use hardware acceleration”.