Video Engine Won't Launch in Pro Tools 11

[haudio]

I recently installed Pro Tools 11 on my PC and have been trying to solve this problem for days now, and see that many other people have had this problem. When I enable the video engine, it slowly cranks through the green load bar and then sits there until I give up and close out of the program. I can get the video engine to launch when I install it on my other non-audio PC, but not on my more powerful audio PC. Any ideas regarding what I may or may not have installed on my audio PC that might be causing this problem? I have been combing forums and tried all sorts of supposed fixes, but to no avail... I really can't wipe my computer and mess up all sessions in other programs just to get this to work!