Manthraxx;
If the game can not create the 'Divinity Original Sin' folder for some reason, that would certainly cause a problem trying to save. If you start the game, change some settings and exit, is the folder created then? There should be a graphicSettings.lsx file created in the D:OS folder, as well as a PlayerProfiles subfolder.
Are you shutting down all non-essential programs (especially anti-virus) before starting the game? Since it is on a new laptop, there may be all kinds of trial crap installed.
Try starting the game directly from the '..\SteamApps\common\Divinity - Original Sin\Shipping\EoCApp.exe' program file by right clicking and running as administrator.
I'm not familiar with Steam portal, so don't know if that could be an issue.
MooseTheStampede;
Do you have anti-aliasing forced in your video drivers? If that isn't the case, did you try verifying local files?
