i installed Telerik ASP.NET AJAX Q3 2011 and the link to the documentation goes to this broken page:
http://msdn.microsoft.com/EN-US/library/D51A087E-5B68-446B-81F2-CA0F1AEB3C79
Our documentation is currently available only when your Visual Studio integrated help system is configured to use local help rather than online help.
You can switch the documentation to a local help by following the steps below
1. Choose Help -> Manage Help Settings from within Visual Studio
2. Click the "Choose online or local help" link
3. Set your preference to "I want to use local help" and click OK
4. Try loading the documentation