The OutSystems Installation log clearly states that the installation is failing on the Integration Studio component. Additionally, although you're PC is not a server, the Community Edition should be able to install on the Vista Ultimate, since the installer also identifies it as a supported operating system.
So i suggest you post the Logs.zip archive, that should exist on the folder C:\Program Files\OutSystems\Installer\, which includes the IntegrationStudio log file, and some additional system logs from the event viewer.
With that information we may get a better grasp of what might be causing this installation to fail.
Miguel Simões João