:O seems like your computer is outdated. You're missing .net framework runtime files. These files are required to run a lot a newer applications that are written in newer programming languages, and I always keep up-to-date with my progamming language.
Here the link to what you have to download (that was also in the news section for - anyone else) http://msdn.microsoft.com/en-us/netframework/aa569263.aspx
