Battle.net Doesn't open wow

After the 8.1 update I cant open wow. When I press play they game will start to launch and battle.net app says game is running then wow will stop running ( as I was tracking it in task manager ).
everything was fine before the update so don’t have any idea on how should I lunch wow again.

See this thread

where people with similar problems are guessing answers.

Thanks for the link. I think I’ve found what I should do.