I am pleased to announce that Windows Installer 4.5 Beta 2 is now available from the Microsoft Connect site. If you have not signed up for the beta yet, please do – we are listed as "Windows Installer 4.5" under the "Available Connections" section of the site. If you have already joined the beta, please head back to the Connect site and download the updated bits, tools and documentation.

This is our last planned beta release before we ship, so your feedback at this stage is especially important!


– Tyler

PS: Due to some unfortunate timing, the Microsoft Connect team will be rolling out a new version of the Connect site on Saturday, March 22nd and the site will not be available from 10:00 AM and 2:00 PM (PDT). If you have issues accessing the beta program afterward, please leave a comment on this thread so we can follow-up on any issues. 


source- Windows Installer Team Blog