Properties Change it from ‘Disabled’ to ‘Automatic’ Run your Diablo 3 setup as administrator and it should quickly go through Updating Setup Files and bring you to an install screen. Fix #2 Right click on the Diablo 3 setup file you downloaded via the Blizzard Downloader Select Properties 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. Alternate location: C:/Documents and Settings/All Users/Application Data Application Data is a a hidden file so you'll need to click tools view tab and check show hidden files and folders.
Properties Change it from ‘Disabled’ to ‘Automatic’ Run your Diablo 3 setup as administrator and it should quickly go through Updating Setup Files and bring you to an install screen.
If your Diablo-III-8370-en GB-Installer folder is substantially bigger than the above listed sizes, check if there are any files in there that end in ".part".
It's a good idea to be patient and just ignore it for an hour.
Here are the steps: Go to Control Panel - Windows Firewall and select "Advanced Settings".After pre-ordering tonight and downloading the client to be ready for Tuesday, we ran into the same problem and thought all hope was lost. Close it, and ctrl alt delete and end the “Agent” process. Go to C/programdata/battle.net/agent and run the “Agent” executable 4. An user on the forums posted his version of the C:\Program Data\Battle. All you have to do is replace his version with your old version, and hopefully everything should work (as it did for me).” -SCH from comments - Fix #5 Additional Notes: If you get a decryption error it means you probably didn’t finish the download. decryption error might also indicate a corrupt download. 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. tried all 3, still stuck I hate blizzard, ever since they installed their stupid "updating setup files.." on beta and now d3, i can't download anything and it keeps stucking it self at 90%...Seriously, If I can't play because of something so shi*y...