Yeah, I know I could had backed it up if needed, but that idea didn't came in mind when I was posting, lol at me.
About the anti-aliasing, I had everything on minimum for the screenshot, I did mention that I tested it in Max Quality and Minimum settings, the problem persisted in all cases...
Well anyways, I uninstalled the drivers and reinstalled the old ones, the problem has been solved. I'll await for a further driver release, because this release isn't working very well with NWN, or just my NWN...
Thank y'all.