The problem follows:
When the player choose to click play on the WoW patcher (after the patch is fully done), it doesn't pop up the WoW client. It will only open WoW when you delete the "Launcher.wtf" file in your wtf folder. But as result, the patcher thinks he isn't done downloading everything, every time when you try to delete this file. The patcher will re-download the "Launcher.wtf" file and again, it won't start the WoW client. The only way to get passed the launcher is to delete this file, every (freaking) time.
My question to Blizzard is: Can you tell us how to fix this or can you change your freaking annoying patch for us? Because we have this problem for a while and it has been posted for many times, I'll hope you hear our call, Blizzard.
According to my information this issue is due to third-party security software that is preventing our software from running properly.
A few antivirus programs tend to move our application files to the quarantined folder whereas other security software will simply prevent World of Warcraft from launching.
As we do recommend players to make sure that their computers are protected when logging onto the game, I can only suggest that you temporarily either disable or uninstall your security software in order to rule it out as causative factor.
Well this helped me and maybe others too, now that we know what it causes the problem.
15/07/2011 13:37Posted by BreezexI could also guess that Blizzard is unable to fix this, because it's your antivirus which causes this?
I've seen this issue solved by adding the Launcher.exe and WoW.exe application files to the antivirus' safe list.
However, this step is not recommended as it would prevent your game files from being checked by the security software. Generally speaking, this issue is often addressed by the security software manufacturer via virus-definition updates.