Please check this link for more information: the Beta, several startup issues were resolved by setting the Diablo III tools to run in Compatibility Mode.At this time, Compatibility Mode for the retail tools is no longer needed.installers start running today (even though you can install the game, you can't play until midnight PST), a host of issues have cropped up.
However you have to do this everytime you want to run Battlenet App or some game. I opened the exe file instead of the I've done this many times earlier and it didn't work so something must have changed, but i don't know what.. But I guess it's fine now that I can finally play hearthstone ; DAlso, one of the things I tried doing earlier was to "run as admin" on the file, but apperantly while using the desktop app having the normal file to "run as admin" makes it so you can't launch it from within the app (even if you run the desktop app as admin). Starting the app with exe fixed it for me instead of the launcher, however it gives me an error when I start Hearthstone (BLZBNTAGT00000843: Failed to launch a critical file).Graev has Windows Vista and could not get past the “Updating Setup Files” little window that came up. ) This one worked for me: try and find the agent application in the folder (for example C:\Documents and Settings\All Users\Application Data\battle.net\Agent). Check the folder you downloaded your files into for any that say . Run the downloader in the same directly you chose originally and it should fix the files automatically and/or finish downloading. We scoured the support forums for days, Googled, and had no luck until tonight. Choose Windows XP (Service Pack 3) (Note: Does not work on Vista.) Right Click the Icon, Run as Administrator. Delete your C:\Program Data\Blizzard Entertainment\Cache folder. Run the Downloader again, as administrator, and see if it gets past the “Updating Setup Files” window. Start the agent application manually and after that start Diablo III setup file in your Diablo-III-8370-en GB-Installer folder. Fix #4a – Clarification for Fix 4 by Garythe Oak 1. ATI Radeon HD 4600, 4700, 4800, 5000, 60 series products are unaffected, as is Windows XP.Update: ATI has released a Catalyst 12.4a driver hotfix for the affected cards.After I've installed the client it's just stuck on "Updating Agent"When I try to reinstall it there's an error BLZAPPBTS0000CI've tried to delete Program Data/(Sooo many times)And I saw an earlier post that said you could update adobe flash, I've tried to completely uninstall all adobe programs and reinstalled them. I can just run that works fine, but I also want to play hearthstone :(Is there anything else I can try?