For more information on basic troubleshooting of the installation, check out Blizzard's thread with tips on what you can do with your computer to fix most issues. ATI has released a Catalyst Please check this link for more information: At this time, Compatibility Mode for the retail tools is no longer needed.
In fact, setting the tools to run in Compatibility Mode may cause other issues with the Blizzard Launcher. If you are having issues with the game and normal troubleshooting steps have not helped, please create a thread here or you can create a Support Ticket on your Battle.
I'd recommend restarting the downloader to see if you can pick that up. When restarting the downloader, make sure to select the same download folder that you did before. It should have the Diablo 3 installer file inside it. Allow the downloader to completely finish. It will launch the installer on its own when it is done. This can often times be caused by closing the downloader early. You may be able to fix this by running the downloader and pointing it to the same saved location so that it may scan and download any missing files.
If the problem persists, let us know. If you've pre-downloaded the digital version of the game in these languages before We apologize for the inconvenience, and ask that you please let friends and acquaintances know so they can begin downloading the working installer that's now available. Obtain the new Diablo III digital downloader using the links below 2. Point the download save at the same directory as before The folder in question is your main game data folder.
If you have the game downloaded to D: Do not use the automatically generated folder containing the installation files i.