I encountered this problem while installing vvvv beta 27 on windows vista (have to use:-( )
but all the dots in crack.exe were green. but at the installation of .Net 4 it told me that i have to install a previous version of .net in order to work. well, i searched the microsoft website for some infos but that was not straight forward so i downloaded vvvv beta 26 and via crack.exe installed .Net 3.5 and now it’s working. thats totally annoying microsoft!!
maybe i’m going to stick with 26 for this project… -.-