@ChelleJo Your struggles made me paranoid curious if a recent system update might have borked the game (again), so I booted into Windows 10, and TS3 launched fine. Although it's beyond my understanding of these things, I'd definitely go with igazor's assessment that your graphics card showing up three times in the dxdiag could be indicative of a larger issue. Sorry I don't have more to offer.
Also, if you're going to post at AHQ, be sure to tag roberta591 (bob007 from here), or else you'll just get me again.
@Jazzypoo The beauty of a clean folder test is that it removes all the potentially corrupt game folder files in one go. The folders can be easily swapped, and files transferred between them, instead of having to go digging through their contents one file at a time.