A couple of people have noted a little perf issue with the installer we used for the WinFX CTP… Our resident MSDN magician did the magic to post the raw ISO image… so if you tried before to install this CTP, please try again. Because of the fun of being on the bleeding edge, I’d suggest you install on a “clean machine” or at least uninstall any other version of Whidbey before you have installed before you start. 

 

Avalon and Indigo Community Technology Preview

 

Thanks and good luck