We previously reported on some Windows 7 installation issues, including a problem in which the installer states “Setup was unable to create a new system partition or locate an existing system partition. See the Setup log files for more information” (see a fix for that issue here). However, users are now reported a host of other installation issues, including one in which the installer freezes during the “expanding files” phase and another in which the screen goes blank near the end of the installation process.
For freezes that occur during the “expanding files” stage, bad memory may be to blame. See our article on checking for bad RAM and replace any problematic modules, then re-try installation.
For an issue in which the screen suddenly goes black, try turning your monitor off then back on again. It appears that the Windows 7 installer may lose communication with the graphics card or the monitor during installation, and powering your display off then back on can re-establish communication and allow you to continue with the on-screen prompts for installation.