Run wow repair. also if you can get a external hardrive backup wow on that so you can save the hassle for that. i do that and i just have to update the launcher each time. Also take caution. i deleted the blizzard launcher from my folder because this is what happend to me before the launcher was updated. still has bugs but i get on fine ( :. Also if you have any experince in torrenting you can go to Thepiratebay.com and look up a Wow 4.x.x download for w/e the patch will support!!!!