The installation of SQL Server 2008 hangs with the installation of the Setup Support Files.
OS Vista SP2, quad core, x64
SQL Server 2008 was running fine before, but SQL Server 2008 SP1 would not install, and consistently wanted me to install updates and shut off my PC. So I decided to completely deinstall SQL Server 2008, and all other versions of SQL Server. The deinstallation hang. After this, I followed some guidelines from other uses to completely manually remove SQL Server 2008, as deinstallation via Config panel no longer worked. SQL Server is now completely gone.
Now when installing, The installation stops at 2/3 of "Performing Windows Installer actions", see screen shot. It starts, and after a few seconds it reaches this point. It consistenly hangs atht the same location of the progress.