Error 193 installing

When installing SQL Server 2005 the first component to be installed by the setup it is it (.NET Framework 2.0), but it happens the following mistake
" Error 193 installing .NET Framework 2.0 "... what is doing wrong and which would be solution

You can try to install .NET 2.0 from windows update or download it separatly and try to install it manually.

http://www.microsoft.com/downloads/details.aspx?familyid=0856EACB-4362-4B0D-8EDD-AAB15C5E04F5&displaylang=en

If it still fails try to include all error messages as it might give a better idea what is going on.

Have you had any Visual Studio 2005/.NET 2.0 beta versions installed?