I've discovered that the Toolset is using the GeForce 845M graphics card and not the integrated Intel HD graphics card, so that's not the problem. Also, I followed the suggestion about rolling back my drivers to an earlier version but, unfortunately, that didn't resolve the problem. FYI: I tried doing a clean install of NWN but it had no effect. But, interestingly, some of the Toolset settings remained the same AFTER the reinstallation of the game. What this obviously means is that when I uninstall the game some files mustn't be deleted. However, I am unable to find the files that remain. I am not sure if this is significant but it seems odd that some of the Toolset settings (unpinned windows) would remain the same. Shouldn't the Toolset settings change to default after a fresh installation? I digress. Do you have more suggestions?