IIS 7.5 is the version of IIS that ships with Windows 2008 R2, and Windows 7.
It is substantially similar to IIS 7.0 from Windows 2008, but includes the following features:
- FTP 7.5 - FTP "6.0" is no longer shipped with IIS, further reducing dependency on InetInfo.exe
- WebDAV 7.5
- Configuration Editor
- Request Filtering enhancements and UI
Because the OS used to run the web server is the Windows 2008 R2 / Windows 7 kernel, enhancements to those platforms are inherited by IIS.
A subset of IIS 7.5 is provided in IIS Express, optionally installed by the Web Platform Installer.