Operating Systems
IIS should be installed on the operating system before installing ISAPI_Rewrite.
Both 32 and 64 bit versions of Windows are supported, but you need to download distinct installation package for 32 and 64 bit versions.
Windows Installer 2.0 is required to run installation program. You can download last version of Windows Installer from the Microsoft website.
On Windows Vista and Windows Server 2008 installation of ISAPI_Rewrite also requires following modules, not installed by default: