Problem:
Using Windows 7 (x64), SQL 2008 R2, Report Builder 3, IE9. When I try to open Report Builder 3 in Report Manager, keep asking for installing .NET 3.5. Run it, save it and run it, and even install 4.0. Still the same messsage.
Solution:
Searched the web, found this blog, solved the problem. Basically we need to retreat to IE 8 to make it work. Crazy!
http://chanmingman.wordpress.com/2011/06/25/to-use-report-builder-you-must-install-net-framework-3-5-on-this-computer/
