Slim Microsoft .NET Framework 4.0 Full x86/x64
About: These packages contain .NET Framework 4.0 Full (Client and Extended) x86/x64 installers including updates (and Language Packs) integrated. For command-line options run <installer_name>.exe /?
Note: The reason its called "Slim" is because the original MSI installers have been carefully edited to remove unnecessary setup junk, this should save you 200+ MB of space on your HDD/SSD.
OS: Windows Vista/Server 2008 SP2 x86/x64 or Windows 7/Server 2008 R2 SP1 x86/x64
Size: 46.3 MB
Slim Microsoft .NET Framework 4.0 Full x86/x64 Incl. Language Packs
Size: 84.8 MB
Some tools and resources for (re)creating your own slim (intl) installer