I have been having issues with playing GTA IV, when I looked online it showed my solution to be going into the properties of the launcher and specifying my available video memory. Great. Finally a solution. Wrong. When I went to my screen resolution and into advanced settings, it says my dedicated video memory is 0mb. I have a Toshiba Satellite S55t-A5237. I do not know much about computers so I'll have to be walked through finding my specific graphics card name.