The OutSystems Platform 8.0 Community Edition is not yet certified to Windows 8 and needs some OS tweaking before the installation.
Windows Home Edition - not supported
Internet Explorer lower than 8 - not supported
HTTP Port Error (80 and 443)
Microsoft .NET Framework 3.5 SP1 Installation Failed
Look at the files ServiceCenterBootstrapWGet.html and ServiceCenterWGet.html. This is a printscreen of the installation verification page and in there should be written "OutSystems Platform Server is running". If that’s not the case, there should be an HTTP error that will lead you to the next step:
Invalid object name 'OSSYS_SOLUTION.
SQL Server install Failed
Unable to enable Shared Memory protocol
Visual Studio Primary Interop Assemblies
System Components publish failed