The installer should be the latest including Mist of Panderia.
On this screen, there's an important button in the bottom left corner with the text "Add Ons". On this screen, make sure any and all addons you wish to use are clicked with an arrow.I spent six hours trying to download battlenet but this fixed it in 30 seconds. PS: I don't think resetting the whole pc was neccesary. I pasted it into chrome and my antivirus had it blocked and asked me if I trusted that page.The logs aren't massive so you can't miss the urls. I was using Bitdefender as my antivirus and it was causing me a lot of problems. So I switched to Norton and the problem stopped working. I accepted then deleted the whole file located in Program Data, restarted the installation and it worked.I reset my whole pc and installed Norton immediately after. I spent six hours trying to download battlenet but this fixed it in 30 seconds.The logs aren't massive so you can't miss the urls. I restarted, then deleted cache as SAPULIDI mentioned. but I hope it doesnt get stuck , making me have to reinstall it everytime I want to play or update the game.When you find an addon you like, just click “Install” and the Client will begin downloading the files for you!