Nope.. just usual Windows.
Had it on different versions of Windows.
Happens to me as well. NWN is laughably buggy.
But I know, more or less, what's going on. They don't hook the the mouse before getting to the load screen, so if you click to move past the splash title screens, you can end up switching to explorer. And as there is no error checking, this causes all sorts of problems with NPE (that's Null Pointer Exceptions), because they don't properly restore when they switch back.
I know a little about this because I have DevStudio loaded on my gaming box, and get it up asking if I want to debug every time NWN crashes.
OK, so here is a little something that can fix it: if, before you click to speed past the title screens, you move your mouse a little to the upper right, you generally won't hit anything in explorer.
There are other errors in the game as well, having to do with networking, and some tilesets appear to trigger a memory corruption bug, but the "move the mouse before you click" thing generally works.
Of course, dealing with any buggy software, YMMV
