Disable Open GL

Hi
I have been using Solidworks with OpenGL disabled since Istartedusing SW and lately I changed the settings in myoptions touse OpenGL but now the box is greyed out and I cannotswirch itoff, what can I do to disable it again?. I now get amessage when Istart SW which I have taken a screenshot of andattached.
cheers DSolidworksAdministration