Hello John Rajendran,
We tested our installation against Windows 7 x64 and it was ok. However we got other clients that complain that they can not complete Silverlight 3 installation on their Windows 7 machines. So we are trying to locate the problem and fix it. We will be glad if you help us.
So could you please send us an error log and also specify what exactly is the error you are getting. Any additional info that may be of any help will be of great.
For now as a workaround you can use the zip version of our controls it is exactly the same, except that it is missing the shortcuts.
the Telerik team