Back in September Microsoft released IE9 Beta, today Microsoft going to release IE 9 Release Candidate and  its download links are already live on Microsoft Website. You need to install IE9 RC on Window 7  and Vista online as Microsoft downloads necessary updates for IE9.

Download IE9 RC  for Windows 7 (32-bit)

Download IE9 RC for Windows 7 (64-bit)

Download IE9 RC for Vista (32-bit)

Download IE9 RC for Vista (64-bit)