You may remove the game files using the Uninstall Program features in Windows (Add/Remove programs if you are on Windows XP).After uninstalling the game, browse through your hard drive and ensure that the following folders have been deleted: C:\Program Files\Diablo III Beta or if you installed to another location, make sure the game folder is deleted.
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. It will launch the installer on its own when it is done.
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.
Do not use the automatically generated folder containing the installation files (i.e.
do not use the directory D:\Games\Diablo-III-8370-en GB-Installer as this is the one created by the downloader). If you chose the correct directory only around 65MB will need to be downloaded to fix your install, otherwise you'll re-download the entire ~7.6GB New EU English Installer New EU English Installer (Mac) New German Installer New German Installer (Mac) For more information or help with the installation, check out the Diablo III Pre-Sale Downloader Walkthrough or use the search on the support site.In almost all cases it has to do with an overlay that the 3rd party programs use that causes the crash.If you participated in the Diablo III beta, we recommend removing all Installation Files before attempting to install the retail client.We've recently become aware that playing Diablo III with the latest Catalyst 12.4 drivers for ATI cards may cause some visual artifacts for specific hardware configurations.This issue affects users of ATI Radeon HD 2400, 2600, 2900, 3400, 36 graphics cards under Windows Vista and Windows 7.If it's asking for a disk then it means an entire data tome is missing from the download.