Your computer has an AMD/ATI Radeon graphics processing unit (GPU) that uses the embedded DisplayPort (eDP) technology. When you install Windows 7 on the computer, a black screen is displayed during the installation process. However, the installation is still running. In this situation, you may be unable to complete the installation. Note If you’ve multiple displays, only the primary screen is black when you encounter this issue. “Cause: AMD implemented eDP support after the Windows 7 DVD was finished. Therefore, the AMD Radeon graphics driver on the Windows 7 retail DVD doesn’t support eDP. AMD has released an updated driver that fixes the eDP issue. The update must be incorporated into the setup process for setup to complete successfully.” Microsoft posted a wrokaround, see KB978226.